For over six years I have been a avid user of (EI) Electric Image from 2.5 to U4. I've found it is a great program for post-production animation. It's modeling program has a much higher learning curve than Carrara, but that can be expected from a higher-end program. It's low-cost is a plus, but it's third party plugin can cost you a bundle. My only complaint is it's "limited" modeling import/export capibilities. It's very limited on that front. Macintosh users can download a converter program from the website. As for the PC users, well your stuck with rebuilding all your models from scratch. Maybe version 5 has more import features. Hope this will help --Ashley3D