Hi, I am a retired teacher (systems, electronics and robotics). I use a CEL-Robox 3-D printer. It was my main introduction to 3-D printing. Here is the manufacturer's website. http://www.cel-robox.com/
The Robox comes assembled and calibrated. It has auto spool/plastic detection, two nozzles for same plastic (or now two different materials), one coarse and one fine. It also has a self leveling bed, plus is (usually) very reliable, and gives excellent, reproducible results . Running on Ubuntu Mate 16.04 LTS at the moment and very pleased with it. Its biggest draw back is that it uses many factory designed parts that are impossible to replace with stock parts. Consequently if anything goes wrong (and it has lately, eg 24V power connection to print head is ultra unreliable) it can be very expensive to replace. Recommended for people who are cashed up, and not many technical skills.
However I am having a lot more fun modding up my Anet-A8 and knowing that I can replace anything that breaks or wears out at a modest cost. This printer is very educational too and produces excellent prints, and is a very cost effective solution. Highly recommended.
Update: I have since modified my A8 to an AM8 using Pheneeny's build to make a from from 2020 Aluminium extrusion and 3-D printed parts. This has worked well and is highly recommended as a great project that improves the printer considerably.
I Am A…Maker, Teacher
Tools I Use…
Printers: Cel Robox , A8 , AM8 (Pheneeny)
Design Programs: OpenSCAD
3D Design Skill Level