I have stuck with a spoiler-free version, even though the trailer they released with a day to go before the film smashes the worst of the spoilers right out in the middle of it.
Basically if you liked the first two of the new-generation Star Trek films you will love this. It keeps all the in jokes, the character building, the action, the music, the TOS references, and basically charges along at a rate of knots.
It has by no means the depth or scope of the older movies, and there isn't really the same political message tucked underneath the story that you might like from a classic Star Trek, and once you sit down and think of it later there are plot holes and continuity errors that you could drive the Enterprise through.
But for the 2 hours you are sat there it is going so fast that you probably won't get time to spot them.