I love the spellchecker, it's already helped me here in the forums. The rest of the new features, I kinda already had through extensions. It incorporated a lot of the most popular extension features. The search suggestions are kinda nice too.
Just waiting for Tab Mix Plus to be 2.0 compatible, since I like their tabs management better. Other than that, I'm pretty happy with it.
My only real complaint is that the "Go" menu was replaced with the more accurate "History" one. Superficial, I know.
Heh. Just found the Closed Tabs List. Now I've got nothing to worry about until Tab Mix Plus comes out.