I saw it with my office-mates last night. I won't offer any spoilers, so you can keep reading
. Even after reading all the downright terrible reviews (one I read said that the only good thing about M3 is that Jar-Jar isn't in it...), we all agreed that it was good. Many reviews state that too many questions were left unanswered, but none of us felt that way after watching it. The ending may be different than what some are expecting, but that doesn't make it a bad movie.
Certainly not as "wow!" as M1, but better than M2, IMHO. The special effects are nothing sort of jaw dropping, and I can't wait for this one to come out on DVD, as by then I'll have my Axiom setup and SVS sub