As someone with a longstanding fondness for most things Trek (I've seen most of the movies and quite a few of the shows), I have to say that JJ & Co did a fine job with this picture; the character dynamics were broadly satisfying, the action scenes entertaining and the set pieces well put together. Most of all I was impressed with the lightness of touch of the whole venture - it would be very easy to criticise the picture for making what could be considered significant changes to certain parts of Trek lore, but given that the changes were accomplished with such comfort and confidence makes them, in my view, perfectly acceptable.
With regards to the acting characterisation, everyone was pretty much solid, with perhaps the exception of Sulu, who I thought didn't have much to do. Kudos, though, to Zoe Saldana's loveliness as Uhura and also, especially, to Chris Pine as Kirk - I had always thought Spock was my favourite character, but it looks like I may have to reassess; Pine lives and breathes that Kirk moxie exquisitely and he'll be great fun to watch in future instalments.
With regards to plot, it's pretty good; there is a decent sense of internal logic to it, without it being too overwrought. True, there are a number of points where you might think, "Blimey, that's serendipitous," but as I'd already suspended my disbelief to accept the possibility of time travelling green-blooded alien from the planet Vulcan, these things really didn't bother me at all. Plus there were a number of points in the movie where they were saying, "We were pulling this kind of shtick 20+ years ago, and you loved it then; run with us on this one," and I was happy to.
Oh, and most importantly of all, the movie is fun; it has the good sense to not take itself too seriously, despite remaining well aware of that sense of pomp and importance that all great character dramas should have, and that isn't a bad thing at all.
How this movie will bear up to repeat viewings, I'm not certain yet, but at the premiere, it was a blast.
Addendum: It's a month plus since I originally wrote this and I have seen the film three times in total now - the opening ten minutes remain a manipulative marvel that the remainder of the film struggles to match, the coincidences and conveniences seem even more far fetched than ever and the jokes seem even more silly BUT I still fancy seeing it again, so I guess it must work for me.
