I'm happy. I got the P6 Special Edition Upgrade Download with minimal problems. To top things off, I got Shade LE right away. I haven't learned Shade well enough to say if I like it or not. It is not easy to learn. I learned Wings 3D by "playing around." In Shade's case, I have to read the documentation and follow the tutorial. Using P5 is exactly like using P4, except there are new features like the Material, Face, Cloth, Hair, and Setup Rooms and Ray Tracing. Also, you can organize your folders, which is a big plus. I only use the Material Room. I use the P5 Renderer when I need Ray Tracing and the P4 Renderer when I don't. Your serial number is on the inside of your CD jacket.