I went ahead and purchased this today as I was not happy with the quality of some models out of repetier or MC. For me it's definitely slices better then anything else I have tried. One thing though that I can't figure out. After hitting the prepare to print and the gcode is generated etc. It won't let me print over USB? Anyone else having this issue? Also disappointing out of all the printers they have pre-configured settings for, robo is not one of them.