Coming from Vista, there are a few things I like and dislike. The speed is great, but the GUI doesn't blow me away. I'll still get it though... to get away from Vista.
The new taskbar is refreshing, but overall, the GUI is OK. The reason is simply because most of it was already done in Vista. They still haven't fixed the "apply view setting to all folders" bit.
This new Libraries crap sickens me. I find no use for it, mostly because I'm already very organized. It seems that with every new edition of windows, microsoft finds ways to keep people unorganized. Even after years with Vista, I still prefer XPs User files. I can deal with Vista's User Folder, but Windows 7's Libraries are just retarded. Now I have to find a way around it... or learn how to use it properly. Right now though, I don't feel like learning. Maybe later.
The control panel is even worse than in Vista. There is too much clutter, but at least in Vista I could find the Mouse icon via the consolidated menu. In Windows 7, I had to go to the Show all Icons and then go through all 60 to find it. It's just too many.
Once again Microsoft fails to be intuitive. There is more to learn with this operating system and it seems more complicated than ever. Am I saying that it sucks? No. Windows 7 is probably the best OS they've released, but they still have a long way to go in order to streamline the OS to make it more intuitive.
PS: Windows 7 is super fast; it restarts in less than 1 minute.