(Comments are free ground for spoilery discussion, so the text of the post will not be cut.)
--I went in without much expectation, hoping for an enjoyable ride and very nervous about the young cast and the idea of "rebooting" my first fandom. O_o I certainly got that ride, and more: I came out with my heart back in the place that made me love Trek so many years ago. Not nostalgia (though there is some of that), but a return.
--The cast was better than I expected, and even the ones I had high hopes for (such as Zachary Quinto) performed even better than I had dared to hope.
--To the knowledgeable fans/purists: this is your film. I'm a trivia-happy fan myself, and I feel like this was made exactly for me. 1/3 of the way through the film, you'll be cursing me for telling you this, but keep watching. They made this for you. :)