I got my upgrade last week, I agree with you the tree editor is very nice, a good addition, I don't mind the interface, I think you can change it if you want.....I also had Bryce 4 and my installation went like a breeze, I had been following up on all who posted bad installations, but no problems here either, and again, my rendering is faster also. I am quiet satisfied with the upgrade, I love the new wood textures also. Sharen:-)