Saw it last night in 3D. Loved the movie. The cast is pretty much perfect. If you saw and liked the first edition of the re-boot, you will like this one. No need to rewatch the last one, but it's a good movie too. Much like the last movie, the action starts in the first 30 seconds. Any lull in the movie is no more than 70 seconds. I found the 3D to be quite pleasing and I love the take on what lightspeed or faster should look like. The trailers have done the movie justice.
I'm not a trekkie, but the plot does harken back to the series I believe. I highly recommend seeing at the theater. It's classic JJ Abrams action.