This has the potential to be a great printer. It has lots of features and a large print area. The touchscreen is nice and easy to use. The frame has an attractive design and seems pretty sturdy, as well. Unfortunately, there are a couple of problems with the basic design that make it almost useless.

First, the Y-axis. So, there's this huge print bed, right? So, you'd think it'd have four points of contact toward each corner (or at least 3) to make sure it remains stable. Nope, 2 sets of rollers right in the middle on either side of a giant square that moves constantly along the opposite axis. No matter how tight everything is, the bed wobbles like crazy. And not just a little bit. That means that all that leveling you did, no matter how meticulous you were, is totally useless. Because it literally can't be level once the bed starts moving back and forth. I could print a file and the first layer would be just perfect, but the print itself is...fine. Like, it is recognizable as the thing I wanted, but the surface finish is awful because the bed is constantly wobbling. Then I go to print the same file again immediately after and the nozzle will either start mile above the bed or digging into it. And I've disassembled it, tightened everything, checked to make sure no parts were defective, put it back together, and spent a ridiculous amount of time levelling it just right. Then I get exactly the same thing every time. And by exactly the same thing, I mean a completely random distance between the nozzle and the print surface. Every. Single. Time.

And the build plate itself. Yeah, it's flexible and everyone's doing it and that's neat and all. But it's still the same crappy build surface they put on the rest of their printers. You'll almost immediately have to replace it with something not awful, so don't let the fancy flexible nonsense affect your decision.

Aside from that, there are a few other problems. The Y-axis endstop works about 30% of the time, because the Y-axis is never at the same level, so it doesn't always hit it. The auto levelling function doesn't seem to have much effect and occasionally tries to dig a hole in the print bed. There's almost as much slop in the X-axis as there is in the Y, but fortunately it doesn't move along the opposite axis from it's support and doesn't affect much. It does make it a little scary to insert filament, though, since it feels like your going to break it every time.

It could be great, though. Add a couple more rollers to the Y-axis, make the rollers the same height as the endstop so that it activates it reliably, and replace the useless print surface with a $5 piece of glass. Or drop the price by another $100 so that I can afford to make necessary upgrades myself to make it functional.

Tons of good features for the cost. Mine came with some bad wheels on the x gantry which caused problems with the auto bed leveling. Fixed by upgrading to new polycarbonate wheels. Worth upgrading to the MK2, but it is a lot of work for the upgrade.

Monoprice was quick to ship the printer, received it in a couple days. It was neat and tightly packed. During assembly, I noticed the bed wouldn't slide, but thought maybe a trick to release at end of instructions. When finished, still wouldn't slide, looked underneath the bed and noticed it was lower on one rail. I discovered the bed had been pushed past the rail, dislocating a wheel from the bearings and placing a small dent in rail. I dismantled the bed, re-centered the wheel onto bearings, reinstalled, and then readjusted gibb tension to prevent bed wobble. After first test print I noticed misalignment of bed movement (slanted print), most likely from the dislocation of bed. I measured from side and re-positioned both rails on back side. After adjustments made, the printer operated flawless. I believe the problem started at the packing plant after initial unit test. Someone was too aggressive, placing too much pressure on foam packing, pushing bed past rails, this takes alot of pressure. I own a Maker Select V2, Maker Select Plus, now the Maker Pro which I believe to be a great addition. I have these set up with a .4, .6, and point .8 nozzle on larger printer. Thanks Monoprice for the direct drive hotend, with the true high temp hotend installed, this machine is, I believe, a better choice than the bowden driven Creality CR10.

Putting the unit together requires some attention to detail but I had no problems. It requires some patience and I needed to re-read the instructions in places.

The updated firmware has made bed leveling a breeze. I had no problems running the setup.

There are no instructions on setting up the reel holder but it is not rocket science. The good thing is that a decent amount of filament (White PLA) was provided with the unit.

Overall, the unit is solid. I think that the printer will be even better with support ribs for the uprights which attach solidly but are tall. I'd also prefer heavier wiring to the print head than the ribbon cable but it seems to work fine. There are no retainer clips for the ribbon cable connector so it would be easy to pull it out of it's socket, something that really should be there. My solution was a small dab of hot glue to assure it stays put.

The flexible print bed provides good adhesion for prints and makes it an absolute breeze to detach finished works. I am not sure how durable it will prove to be over time but replacements are readily available. The printer comes with a sample print in the for of a butterfly attached. This is to show the end user that the printer has been tested and worked properly before shipping.

Overall, this is a great printer and it produces good quality prints. There is room for improvement but for the price you would be hard pressed to match the build volume and quality. It is obvious that Monoprice have paid attention to feedback. The new firmware fixes the prior problems with leveling and a friend tells me reinforcing support ribs are now available.

Sent it back broken when I got it. Bed unlevel. Bent bearings coming out wheels

The printer arrived with the the packaging & printer in good condition. After attempting to print a test print, that covered the entire print area, I discovered at least two assembly/build issues (build issues from the manufacture). The pulley for the bed front to back belt is at an angle - the belt rubs on the edge of the pulley. This is obvious when looking the it from above. This should have been caught at assembly time by the manufacturer. The second issue is the two rails that the print bed moves front to back on. These are not parallel - they are 4-5mm different in the rear vs. the front. This causes wobble in the print bed at the extreme range of its travel. I opened a support case with Monoprice. I provided videos & photos. They did not understand, and recommended tightening the wheel assemblies that hold the bed on the rails. This manufacturing issue should have been caught in production and not shipped this way.

This is not for first time 3d printer"s. If you have many hours on a 3d printer machines, then you could consider this machine. Instructions are very poor. Construction for the main parts is great, but where the extruder attaches to the X beam is very weak and the extruder can move/flex, also the Y axis is poorly design and has lots of slop in it, bed is not very stable It took a lot of work to get the z axis to move with both motors working together. Binding on the z threaded screw took time to get it to work. Leveling the bed with the auto leveling is very difficult, took many hours to get it right and instructions are no help. Trial and error with the setting of the prox switch is the only way to get it to work. This design is a good start, but much work is needed on the y axis and extruder mount. Software is also not easy and is not like any of other Monoprice 3D printers that I own.

After owning the Monoprice Ulitmate (Wanhao D6) for almost a year I decided I wanted a CR10 clone for larger prints. I researched several CR10 clones and decided on the Monoprice Maker Pro Mk. 1.

The main reasons for choosing the Mk. 1 over other large printers were:
* Dual z-axis standard
* Direct drive extruder
* 24V heated bed (faster heat times but still safer LV)
* Integrated electronics into base (smaller and less cluttered footprint)
* Touch screen
* Self leveling
* Magnetic build surface
* Auto resume after power interruption
* Full metal hot end is included

Package received on time and in good order. The unit is fairly straight forward to assemble and went together in about 30 minutes. The frame is built from what appears to be 15 series 8020 aluminum extrusion. I've built several DIY CNC routers from the same stuff. I will be designing and adding gantry supports to stabilize things on taller prints. Wanhao has them available but I can make them fairly easily and for less money.

First couple prints with PLA went fine but I then began to have issues. The x-axis beam began to sag on the motor side. Realigned everything and tightened up the adjustments and everything has been holding well since. Also, had a glitch were the autolevel was thrown off for some reason and the nozzle burned several grooves and holes into the brand new magnetic build sheet. Literally, I went from completing a great print and starting a new one off of the SD card w/o any power down or anything and the z-axis buried the nozzle and drug it across the bed creating a nice canal through the brand new build sheet.. I haven't spoken to MP about replacing but maybe they will send me one. Since then I went and found a video from Wanhao about resetting the sensor height to fix the problem.

That aside, I'm about a week in and have printed several things including a large 48 hour print. The machine has held true and produced great prints with PLA. I have some ABS and TPU but haven't yet attempted any prints with them.

All in all, I'm very pleased with the Mk. 1 and feel like the price is decent considering the upgrades that it includes over other clones in the marketplace. I haven't yet tested a lot of the features of the machine but the initial impression is very good and the print quality has exceeded my expectations.

MonoPrice has no clue on how Auto leveling works and there instructions suck. the instructions have you manually leveling the X axis rail by putting a small level on it and leveling it by turning nuts on Z axis. Then it has you run the Auto level and the auto level runs through the process. Then when its done you don't know if it did anything. They want you to believe it is doing something but how do you know it is doing any thing. Could be that you just manually leveled. I don't trust that auto leveling and I don't want to waste my time and material so I check the leveling. If you want to know if it leveled correctly after you use the level on the X axis rail make sure to put the level on the bed and make sure the bed is leveled also. The bed doesn't move so they would have you believe the program will compensate and line up to the bed while it prints your model. That is fare fetch and your going to waste material if you believe that. There is a reason why this Printer drop from $599.99 to $449.99. Printer has potential I think I will start you tubes videos to help people that buy from MonoPrice
Just keep eye out for SolidStart

Overall, excellent. I needed help assembling it but it really wasn’t too complicated.
The finished models are beautiful.
One difficulty: if you cancel the print the extruded does not automatically lift.
Overall, great