When it's bad, it's really bad (bugs that will stop the game for minutes or completely crash the game, horrid level design that doesn't allow for restarting somewhere in the middle of the mission, and a level of difficulty that seems downright sisyphean.)

But SR does have some good things, a decent soundtrack, good characters and voice acting and it's generally fun to play.

Xbox 360's first multi-disk game has THREE DISKS!!!1 Story here from IGN.