I've been renting from Gamefly for many years. This is one of only two games I've ever opted to keep.
Graphics are great, story is great, acting is great. But the real reason the GAME is great is that it puts pressure on you to make big decisions, and the decisions you make change the course of the story and the game. There are 18 different endings!
What I really like is that you can just keep playing from beginning to end, all without having to go back to a save because you died. You've got four characters and if one of them dies, you can just go right on playing. You haven't lost -- you've just changed the course of events! I suggest you approach the game the same way. It really makes everything you do seem all the more consequential. It also makes the whole thing much more replayable.
This game was really good. Had a very interesting story and makes you think on your feet. Only downside was choppy or slow character movement when you are in control of them. I played Beyond and it seemed like they fixed all the problems this game had.