We've been printing successfully few keychain through usb, it prints pretty good, far better than the davinci by far, but we still haven't figured out how to print via sd card, but then again we only tried gcode and stl, and it seems not to be working, anyway my X-one is closed, it came with 3 plexiglass panels to mount, and we actually realized it's the X-one 2, so probably a refresh, or revision, but seriously so far so good, for ~430€ it does a better job compared to a ~630€ printer.

http://i.imgur.com/DaTcriN.jpg