Cool effects, although some things look far too new (especially the Enterprise bridge), while others have a nice retro-feel (engine room).
Timeline gets totally fucked up, that's a bit sad, but it opens the possibility for a new line of sequels to the prequel I guess.
Most of the actors were okay/good and I genuinely had to laugh a lot during the movie, many of the jokes were spot on, others were great references to previous Star Trek stuff.
The main villain was kind of a douche.
Overall, not exactly Star Trek (at least in the TNG/Voyager/DS9 sense), but still a good film, had lots of fun with it.