The buggiest game I've ever played.
However:
This is by far the buggiest game I've ever played. It suffers from all the problems that Saints Row 2 had (lots of unreasonable lag, buggy cars, poor AI, etc) and slaps a load of major bugs on top of it. I don't know if this is the case with other PC players, but this game often crashes at the menu screen, resulting in me having to cut off power to my computer. No game should be released with that kind of bug in the software.
Despite the fun that this game can provide, the sheer brokenness of the game will often irritate you. This game performs poorly in terms of FPS, despite having mid-range graphics. If you're looking for mass destruction, Just Cause 2 and Grand Theft Auto 4 are still better choices. This is a major shame because SR3 has massive potential, but has (like many games of late) been let down due to bugs.