Hmmm let's see... you can enter a distance as a fraction of the workpiece, you can make tool (job) templates... maybe the biggest "new" addition is that any vector or text can now be warped or fit to an arc. I think V6 automatically compresses files, and that might be the compatibility issue. Other stuff like adding a border to a textured background, toolpath heirarchy, better tool management, toolpath optimization, view screen automatically resizes now... I can see if they charged $25 or even $50, I'd budge. But $150?