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Overall, not particularly revolutionary, but on par with Firefox (unless you use a lot of extensions I guess).
Not in my opinion. IE still renders pretty badly. I still have to workaround the horrible CSS rendering and the lack of PNG transparencies is annoying to no end. In fact I had to deal with both of those problems today and unfortunately it's a pain to workaound complicated CSS layouts and GIFs just look terrible.
You're right. I meant the user experience and performance is on par with Firefox. I haven't tested the rendering much. I still looks pretty bad.