You Either Like it or Hate it
I've been reading a lot of the comments on here and it seems like everyone either likes it or hates it, no in between. I found myself laughing pretty hard at some of the jokes Ms. McCarthy says. I've always thought Sandra Bullock was overrated (just my opinion) and her role in this movie could have been played by anyone. She was basically playing the same role she played in the Ms. Congeniality (i.e. FBI agent with no home life). The role simply required someone to be a straight (wo)man for McCarthy.
Having said that, I thought the movie's biggest drawback was the action wasn't funny, it was just a series of funny one liners. I thought McCarthy's delivery was the funninest thing in it, but the series of events were just an excuse to get her character into position to spout crass zingers (funny as they were). In other words, the plot was not being driven by events that were funny. It was a pretty vanilla cops and robbers script with lots of worn out cliches. Still, McCarthy's energy makes it just funny enough to not feel like you wasted 2 hours.