Rewatched this yet again tonight, and I have to reduce the grade to 3/5 from 4/5, it's still amazing in the first 30 or so minutes, but after that, it just loses the pace, and isn't really the same. Still very good, tho.
This movie is a blast. At least at it's best. The chemistry between Bullock and McCarthy is really good. The only real drawback is that it is a bit too long, to be honest, but it is a clear 2/5 as it is. And how many movies with Marlon Wayans can claim that?!