I would highly recommend not getting this game. I read all the points everyone made and decided to install the disc to my harddrive and play through for 1k without turning off the console. I had it freeze on me loading twice, but was lucky enough to be able to continue. I'm still stuck at like 630 in this game, the Flawless shit is super annoying. Even if you see this game for 2.99 just please don't put it on your gamertag. It is a terrible game and the glitchy loading makes it that much worse.
Gotta love that this 98% of this forum only follows current games. No one remains active in forums of games they've finished. Good luck getting achievement tips for an original release.