I got this from gamefly today, played for probably an hour and a half. I'm up to chapter 3 so far, and while I like the game, I think it's kinda boring. You can pretty much exhaust the depth of all three weapons in about 5 minutes, and there's hardly any enemy variety so far (and all of the enemies have about 5x as much health as they should). Visually, the levels are fantastic, but they're actually pretty repetitive and extremely simplistic to play through.
But I still like it because the art design is pretty amazing, and the music seems good too. Hopefully it picks up a little later. If not, oh well, I wasn't expecting much out of this anyway.