Summary: Overall not a bad product. Only thing I don't understand is why home users (primarily gamers) are buying this. If you like throwing away money for a couple features you probably won't use (bitlocker and language select) just for the "Ultimate" brand, then I guess more power to you. For everyone else who doesn't like throwing money away for a the 'Ultimate' name and functions they won't ever use at home, get Windows 7 Pro instead.
Pros: Bitlocker, Language swapping
Cons: Overpriced, works practically the same as Pro
Summary: Windows 7's UI is much more user friendly. Setting up my home group was a breeze. If you're still on XP I would recommend switching. I'm not sure how much better this is than Vista except for some of the little tweaks they put in.
Pros: -Boots faster than XP and Vista, -Snap in feature is pretty hand, -Putting recycle bin in the task bar keeps the desktop clean, -Less clutter on the task bar, -Easy home group setup