Just got my Davinci printer and I am not impressed. Even on the finest setting the layer lines are very visible and out of 10 or so models I have yet to get one that is usable. I have tried everything, updated software and firmware, calibration and cleaning. I replaced the standard filament in the cartridge with Afinia premium filament and it wont work at all. It seems the extruder temperature is too low for the Afinia plastic. I think its the software since all the mechanical aspects of the printer seem good.