here are the problems i was having:
1. random freezing: during the game, it would just freeze and i would have to turn the power off.
2. unreadable disc: during gameplay i would suddenly get a message telling me that hte disc is unreadable and to clean it.
3. freezing on exit: whenever i quit the game and tried to return to the main menu, the game would freeze.
4. infinite loading: in the middle of gameplay, the loading screen would come up and not go away. something seemed to be perpetually loading and wouldn't stop.
THE SOLUTION: i know i'm not the only one who has had this problem and i tried everything. i returned the disc 3 times and got new ones from different stores, opened my 360 and cleaned the lens and everything inside, tried playing the game from the disc and installing it to the hard drive. nothing worked. i tried the final solution. yesterday i bought a new 360. game works perfectly now. sorry to tell you, but your 360 may be going or maybe just an older model not capable of handling some current games. i don't know if this is microsoft's fault or not, but looking at their 360 hardware track record, i'm sure this could have been avoided by them.
so, in conclusion, either contact ms and tell them you have a faulty unit, or go buy a new one. just make sure it comes with the BenQ drive.