I picked this thing up on a whim during some sale it had on Steam. I played through the first section of the tutorial then put it down for like, I dunno, a month? Anyway, I picked it back up because it was on my installed games list and just crunched through the entire thing. Wow, this game was pretty damn awesome. Also, playing things on PC w/a controller beats playing on consoles hands down if your computer can handle higher resolutions and options turned up.
Just thought I should chime in here along side the other people who seem to have enjoyed this game. It started off slow (to the point that I just turned it off) but once it gets going, it really picks up. I thoroughly enjoyed the story and characters (another impressive feat for the type of game this is) and the enemy and level designs were really impressive. Especially some of the larger bosses.
Anyway, if you can grab this on the cheap, I'd recommend you do so. The story is pretty good if you give it half a chance. Big Bo!