Of all the programs I have used (and they have been legion) this is by far the best. I have been using it for a little under a year and I am loving every minute. The UI is very well layed out and totaly customizable. The lighting system coupled with Advanced Render produces spectacular photorealism, and the shading and texturing system leaves nothing out. With MOCCA advanced character rigs are easy to do. But by far my favorite feature has got to be PyroCluster and Thinking Particles. Talk about your powerful particle system! If you just bought the program and want to get some good tutorials, visit www.c4dcafe.com and www.3dattack.net. Enjoy!