Saw it today with my sister. It was silly, but a lot of fun. The 3D was nothing to write home about.
I was a little disappointed that Kirk didn't say 'Second Star to the right, and straight on til morning' or something like that at the end of the film, what with all the other references that were in there. Nevermind.
Cumberbatch didn't really need to be Khan. He was a good baddie, sure, but he could've been Joachim (or Joaquin, however it's pronounced.) That might've actually been better.
I liked it quite a lot, despite a lot of the stupid stuff. I'll definitely go see it again.