I got burned by Autodesk back in the early 90's when they came out with a product called "3D Concepts" - 3D programs back then were buggy and archiac by todays standards.

Anyway, the program was cool except if you boolean'd holes in your object it would display fine in the package but upon export the holes was missing!

Sent in several reports on this, it was never fixed, product dropped - just a quick program for them to rake in $250 to obtain some revenue and they moved on.

It looks like a powerful product but the idea is to get you hooked now, charge you later...

Caveat Emptor.

-Will