After downloading and installing an update, and installing the game itself for like an hour, the game will take you to the main menu flicker, tell the installed game data is corrupted and then kick out to the XMB.
I looked online and alot of people have the same problem or a problem of corrupted save files. The point is this game is broken, poorly ported, and unsupported by EA and Bioware. Don't buy nor rent this game, any of the Mass Effect games, none of them work on PS3, if you really want to play them play them on Xbox 360 they were obviously made for it, and copy and pasted for PS3 for the money. After all, it is a EA game we're talking about, is this really a surprise?