Poser5 will disappoint you if you are expecting "the basic stuff" to be smoother, faster, or more stable. CL instead focused on adding dramatic new features, as others mention above. ChristianB - cool, really cool - I'd stayed away from material room complexity, but now I'll have to get into it grin IMO, Larry Weinberg's strength has never been in making a product easy to use or stable. Still, Poser, whether 4 or 5, does useful stuff at a decent price. I've got my money's worth. But to most "casual" users, who already have Poser 4, I would suggest instead spending that upgrade money on more "content". Subscriptions to PoserWorld and PoserStyle, plus ponying up for the DAZ platinum club. Morphworld 3.0. Discounted "classic" content CD's here or at DAZ. Better "textures" for the models you already have. Buy some 3D modeling package, and learn to "tweak" those inexpensive models into just what you want :)