Saw it at lunch today (by myself) and then my husband (who usually will not go to the movies) told me this afternoon that he wants to go see it this weekend (doh!). I certainly won't mind seeing it again. I thought it was a very, very good (not great) movie. Don't want to give too much detail - not a lot is given away in the trailers.
I enjoyed the 3D aspect. As the previous poster said, there aren't a lot of 3D in your face type things, but it really makes everything pop. "Partly Cloudy", the "short" film was pretty good too. The other movie previews for "Shorts", "Cloudy with a chance of Meatballs" and the hamster movie (G-force) were all in 3D as well.