Slightly unfair review!
So Ubuntu 11.04 is no good simply because of the scrollbars, and it didn't have a release candidate?? Bit harsh.
And I'm totally confused by all this Unity hating. I'm using it right now, and it's great!
Lots of people seem to be complaining that Unity is dumbed down. I'm finding the opposite. I want an interface that's fast and that I can get around with using the mouse as little as possible.
Gnome2 required too much point-clicking. With Gnome 2, it was Alt+F1, hopefully find the right category for the app, move up down with the keyboard to select the category, then move up and down to select the right entry, and finally hit enter. With Unity, I tap the win/meta key, start typing what I want to run, it appears and I hit enter. What more could a power user want? And guake still works fine if I want a terminal up.
Unity is smart, it's stable, and it just works. I've got more screen space, it gets out of my way, and it's fast. Gnome 3 on the other hand is slow, to switch apps I have to click some 'Activities' menu, then find the screenshot of the program I want, then click on it, and finally hopefully it's the right one. Why on earth would any power user not use Unity? It's the way to go. And if this is only the first release, I think it's gonna rock within a year.
Everyone seems to initially hate Facebook for making radical changes, but eventually they realise how awesome and common-sense those changes are. With Unity it'll be the same.