surprised nobody gave their 2 cents yet, but as for as the movie goes thought it was pretty killer. people say the reboot is too soon or unneeded, but as much as I love Sam Raimi, I always thought his versions never did the series justice. (and I disavow the third one) this was pretty much everything a Spiderman movie should have been.
The 3d was excellent, you really got lost in it, and you just became a part of the movie. nothing too annoying or in your face, just molded another level in the cinematography. I know there is the diary of it posted, and the major disappointment for the film with me is that it didn't go through a 4k DI. everything was scaled to 2.5k for the most part except the shots that did a heavy amount of scaling and post zooms. and everything was kept baked rgb log. the rgb log part doesn't bother me as much, but watching it imax 3d, I really saw the immense amount of sharpening they used on a lot of the shots. which I feel like it defeats the point of having such a high resolution acquisition medium. To shoot 5k, just to downscale to 2.5k and blow it back up to a huge screen and have to stack tons of sharpening just to keep it from looking soft.
granted imax is just 2x 2k projectors side by side, but I feel like you gain more out of downsampling on the finish. I'm not sure if Prometheus went through a 2k DI or a 4k DI. but it def did look a lot cleaner and naturally sharper than Spiderman did. didn't see any additional sharpening at all. if there was any it wasn't as aggressive.
Otherwise, Spiderman was the definition of a summer blockbuster. good humor, good characters, big action. some scenes at most felt a rushed, but the pacing was very nice as well. didn't even feel the 2+ hours :)