Hey Dave I have an old Robo3D as well as the new Robo "R1" I got a month ago. They've made great improvements on the machine I noticed so many changes rite out of the box. Didn't have any problems what so ever. All I had to do was calibrate my z offset and she was printing beautifully. The new R1 is a whole new machine compared to my first one.

Don't let the bad reviews scare you as most are outdated. I love my R1 and it's incomparable for the price. Plus the 30 day return warranty and the 90 day parts replacement means you don't have much to loose if you don't like it. Hope you find what your looking for!