I'm using it right now, so far it's great! Unfortunately the new taskbar isn't in this version. Explorer is greatly improved and much better organized and system feels more snappy in general. The explorer automatically adjusts headings depending on the content of the folders. Also, the bubble notifications are much less annoying, you view them once and it won't keep reminding you of the same thing. Also, it automatically detects the max resolution of the display, which is nice. Windows Backup is a nice addition as well. Networking is very nicely done, it makes network sharing a breeze, there's no questioning whether network sharing is working or not like in XP. My wireless card worked with drivers as did my sound. Unless something crazy comes up, I'm using this as my primary OS.
EDIT: The library feature is cool, you can add folders to my music and my videos. So instead of having a "my music" or "my videos" that you never use, you can link other folders on different hard drives to the system's video folder.
