I just got back. I loved it. Thought it was better than Cars and Monsters Inc., which I thought were the worst movies from Pixar. There was a trailer for Wall E and another for Enchanted, which is the 2-D animation flick from Disney and then the characters change into real life people -- it looks funny.
EDIT: The crowd was exploding with laughter constantly, I had a few hysterical moments myself. About the plot not being plausible, IMO it was. They way they showcased it worked well with the movie. The rat moved and acted like a rat. How he was pulling the guys hair, I'm not sure how, but I thought they made it look kind of natural. I thought it worked well. This was definitely a fun and imaginative storyline from pixar, and they made it work really well. All in all, it wasn't the absolute best from Pixar, but it's an instant classic and one of my favorites.