I've been a hard core Studio 5.5 user and squealed like a stuck pig with the new Carrara interface. However, the interface is very similar to Bryce and Poser so the learning curve to use it was small. After forcing myself to learn the new 'rooms' in Carrara I can now model faster and more efficiently than in RD 5.5., especially with the shaders. There ar also some undocumented features that are nice as well as some vertex enhancements that I could have used many times in RD 5.5 Couple all of that with the faster rendering engine and it's worth the bucks Mark