Monoprice MK11 is awesome. Solid build. Prints come out just fine with little bit of build bed preparation. Its main power supply fan is little noisier compared to a desktop's power supply but its tolerable. I'd recommend this printer for anybody on budget and enthusiastic about 3D printing.
I bought the open box. I was put off by it having over 100 hours on it when it arrived. I've put another 550+ hours of printing on the unit. Drawbacks: The print bed is actually 196 X by 200 Y by 168 Z. When starting up and randomly when idle the fan on inside sounds like a air raid siren. I'll be replacing it soon. The included Cura software, is a very old version, I never used it. Running Cura 3.6.0 ATM. The first print you should do with it is a new part cooling shroud as the original is garbage, print it out of ABS so it won't sag. You're going to want to replace the two fans on the extruder as well, but I'm still using the originals. Even with these negative remarks I friggin love this printer. It's 24v not 12v which means quicker heating and more consistent hot end temps. For the price it can not be beat. There are tons of resources out there to improve the printer as it becomes necessary. Flash marlin firmware to it, use current Cura, get Octoprint, and you're well on your way!
I'm very happy with this printer. It does a pretty good job, but does require some work.
First, you're going to want to replace the putty knife that comes with it. The cheap metal bends badly and will scrape up your print surface. Go grab a Wal-Board one from Home Depot. Less than $10, but will save your print surface.
Second, look into Octoprint. It supports the profile generated by the ancient version of Cura included on the SD card, but provides a more modern interface, IMHO.
Shipping took over 5 days longer than estimated. Set back my entire production schedule. Units also arrived in dismay, missing several components and some printers were damaged and needed serious maintenance. 3 of the brand new printers are still down for repairs. After attempting to deal with your customer service/returns I am uninterested in trying to send them back, I will just hopefully be able to repair them internally. I have bought close to 20 of these printers and it seems the quality is extremely inconsistent and getting worse. Of all the printers I have, the first one I purchased is still preforming the best. For example, in this recent batch one printer arrived with the bed bent about 60* and several have the connector to the stepper motor super glued together making it a nightmare to remove. Overall for the price I do believe the Ultimate is a great printer, but it has been frustrating that of the last 15 printers purchased this month, only 10 arrived operational
While I have been able to get some decent prints off of this machine - it is still causing me immense troubles: The leveling screws - one is extremely tight and will not spin without using an additional tool, the screw itself comes free spinning after a time and no longer lets you adjust the height after, The shaking of the machine gradually loosens the other screws.
Z-Axis motor coupling came loose and had to be readjusted which required disassembling the entire lower enclosure.
Nozzle had a burr which is causing molten plastic to just adhere to the outside of it rather than the bed.
There is a great printer in here - the prints I've gotten when it works are awesome looking, and after some tweaking they were amazing. But things just keep acting up - it's like having a supercar with too many miles on it; you never know what'll break next.
Its so nice. Its not perfect, but you can get it there with only a bit of work. I am so happy with this printer. I know it has some flaws, but for this price, its unbeatable. Everything on this printer can be fixed with the community behind it.