A great way to visualize geometric shapes. I like the fact you can create a cutting plane, then adjust the planes position and orientation within the 3D shape before actually making the cut.
I would agree with a previous review that more shapes would be nice (cones, cylinders, sphere and the like).
Also, it would be nice to have some sort of transparent coloring for the faces (that can be turned on and off) to help differentiate faces closer to the eyepoint and those on the backside of the object.
wrtyler about iCrosss