Pros:
* Great entry-level price
* Excellent first or secondary printer
* Auto leveler works (after gcode configuration)
* Solid/proven company name (monoprice/IIIP)
* Plug-n-play operation (sort of)
* Most of the problems I've noted below are probably fixable via firmware updates.

Cons:
* Could not get working via macbook connection
* Requires GCODE configurations (not entry-level friendly - see tips)
* Filament loading is difficult (not entry-level friendly - see tips)

Tips:

* Use offline printing (SD card) to avoid software or network problems ruining your prints (completely personal preference)
* MUST USE LOW DENSITY SD CARDS - High density cards will not work and it won't tell you why.
* Unwind the PTFE tubing (white filament tubing) from the cable bundle to make loading / troubleshooting filament easier
* May need to detach PTFE tubing to properly feed filament into the extruder (print-head)
* GCODE for auto-leveler must be added to the "Start" GCODE in your machine configuration. You also need to fine-tune the leveling in the GCODE. (see below)
* Common bed adhesion practices still apply here (blue painters tape makes PLA stick to the bed better, etc)

GCODE for auto-leveling:
You will need to add a G29 command to trigger an auto-level before each print. Mine looks like this:

G29 C-0.4 Z0.1

The "C" parameter can be used to fine-tune the leveler. Negative values will level closer to the plate and positive values will level further from the build plate.

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Good Luck and enjoy your printer!

Only 4 stars due to small bed size and slightly odd-ball control interface.

Used within its physical limitations, this printer is capable of surprisingly good prints, with clean, error-free layers, excellent registration, and very consistent flow rates using PLA Plus+.

Setup using Repetier/Slicer, its prints are as good, and for smaller objects better, than my highly tweaked Wilson2 Prussa clone and certainly exceeded our expectations for its low price.

Produced perfect test print straight out of the box.
I brought it into work where we have 3D printers costing up to $400,000
The engineers were all impressed and the performance vs cost.
A great choice for my first 3D printer... thank you Monoprice !

BLUF: The mini delta is an accurate and speedy printer with all features one would need this side of a Prusa.

Pros:
- the price is in impulse-buy range.
- delta kinematics allow for faster print speeds in addition to just looking cool.
- works right out of the box.
- accuracy: first calibration cube (no adjustment) was fewer than 100 microns off on all sides. At .1mm, I can even read the writing on the back of a benchy.
- compact and sturdy, it's now my preferred travel printer.
- all the features, heated bed, auto cal, etc. There's really not much to upgrade our mod.

Cons:
- connectivity: micro USB would not work reliably, and the SD card is finicky (cause of my two failed prints (out of around 30 prints/ 500g filament). I have to reformat it every week. I haven't tried WiFi yet.
- noise

Tips:
- Use 6 point bed leveling. Google the g code to input into Cura.
- format the SD card as FAT32 and uncheck quick formatting. This works most consistently for me.

My first print is going as I write this, and I'm impressed with how far the technology has come in such a short time. I have a Select Mini as well and while that printer is great, this one blows it away. I had it out of the box and printing within 5 minutes. Great quality and speed - I'm looking forward to trying an ABS print - something I was never successful with on my Select Mini. Not having to level the bed is worth the price of admission itself.

Printer works fine on PLA but when trying ABS bed will not go higher that 60C. Contacted tech support a week ago and no response. Specs say it will do ABS and bed should go to 100C.
Not sure why no response.

I'm writing this in comparison to an MP Select Mini. The price is lower and there are more features. However, there are also some things to consider.

- The Delta is a bit noisier than the Select Mini
- There is no power button so to turn on & off you need to unplug the power
- Auto bed leveling is nice compared to the Select Mini since you have to twist each screw individually
- The buttons on the Delta are not as user friendly as the Select Mini, just personal preference. There's also no manual movement options on the Delta which was present on the Select Mini, maybe because it's a delta printer vs standard cartesian?

I only played around with it for a bit but I was not able to get to 250C consistently, it would drop back to 243 and fluctuate. The bed temperature also never reached 50C. The Select Mini was was a bit slower in heating up (both bed & nozzle), but at least it was able to get to these temperatures and stay there.

Still, I was able to print a relatively complex print with the Delta with slightly faster speed than the Mini. For the price, this is definitely hard to beat.

I initially struggled trying to print with ABS and then realized this printer really can't sustain the heated bed at the recommended temperature to support this material (even though the specifications suggest it can reach 90 degrees). Once I switched to PLA things started working great!

It is what it is. It's cheap, fast and adequate. It has alignment issues, dimensional drift in the prints, and the gap between the feed tube and the extruder itself, which can be a point of jamming if you don't preheat the nozzle and force some filament through to clear any jams due to cold filament.

It's very well built. Well packed. A solid machine that has bed leveling and easy to set up. It's also fast. I'm impressed. It will make a great secondary printer next to my MP Maker Select V2 (Wanhao i3 clone).

This will work great for brackets, braces, items that do not need to worry about finish. I think it will be great for a backup system. I'm very happy with it, but I would not have it as my primary machine.

Build quality is very good, extremely easy to get started printing.
The print quality is fantastic.
It's light weight and portable-what more do you want?