Wowsers! I loved it, but I get why some Trek fans won't. Easily the best film I've seen this year. There are a few things i wish they would have done differently though. For one, not use Khan. There were after all 72 other supermen they could have used instead. Also, I wish they would have had some other way to save Kirk instead of the Deus Ex Blood.
Now that I have the negative out of the way, onto what I loved, which does outnumber the bad.
I think they did a much better job this time around with giving the rest of the original 6 crew a job that wasn't just their stereotypes from the original series, but fit their characters perfectly.
I really liked the opening, it felt like the climax of an original series episode condensed down.
I really loved the reversal of Kirk and Spock in the engine start up scene, although I could have done without the Khan yell, but it was well placed and made sense in the story.