Nobody should go into Fast Five expecting it to have pretenses of good writing, believable physics, or emotive acting. That said, even sober intellectuals can get something out of this popcorn-popping action romp. It's the unintentional comedy of the year with how seriously it takes itself, and as long as you don't take it seriously too, you can get quite a few laughs out of the overwrought cliches and hamfisted attempts at profundity.
Nothing new to see here. Fans of the series will be inexplicably unable to avoid seeing it, and everyone else will scratch their heads trying to puzzle out its appeal. It has redeeming moments, but falls short of emotional investment, moving characters, and even compelling action. The action sequences were watchable, but below the par, and certainly not good enough to carry the rest of the movie. Comic relief was solid, but duly spread throughout the script, such that it doesn't ever manage to pull the experience out of its rut.
If you're not already a Twilight fan, don't believe the hype. While watchable, this movie, like the first in the series, was overwrought and filled to the brim with heavy-handed teen drama. It tries to convey a serious, tense tone, but I couldn't stop rolling my eyes. While the production value was certainly high enough, and there are enough endearing moments for anyone to find *something* to enjoy, I can't honestly recommend this movie. It's a throwaway money maker that will be instantly forgotten once the Twilight craze dies down.