I have been working with the 2nd generation Cube for two days now.
I have downloaded Google's Sketch Up as a way to design my own objects for the printer. You have to download a .STL exporter so that you can send your designs to the Cube software.
I have printed three objects and I am on to my fourth. The first thing I printed was a design that came with the printer: a tea cup.
The second and third was a simple design I made in sketchup I have been having some issues getting the surface to be as pristine as I would like.