I just came back from the theater. It was a nice movie. Funnier than the second and with a better plot. I noticed some things that were in the trailer that didn't make into the film, like the ''spray paint'' alien in the wall. Not that it is a huge miss, just wondering where that would fit.
There were some moments where I felt embarassed, like O's speech, but Jones, Will and Brolin were all great, specially the latter. I'm impressed by Brolin's capacity to really convince me that he was a younger Tommy Lee Jones.
The ending was also really nice. It's what I expected but it was one of my favorite things in the movie. If they decide that this is the last movie in the franchise, then it'll have been worth it. It was a nice wrap up. They're indeed getting too old for this.
Good movie, but not better than the first. Not even close, in my opinion. MIB was just so special that I can't name with precision what it did so right.