Let me start by saying that Hideo Kojima is a genius. However, this current version of Metal Gear Solid 2 is a sub-par work for him. In spite of the high level of interaction and great gameplay, the cinemas, as others have said, overtake the game. It feels almost as if you're playing a Final Fantasy game at times. Furthermore, the fact that you don't get to play as snake all the way through is thoroughly frustrating to the point of causing a loss of interest in the game on my part, and on the part of many other gamers. Hopefully, Hideo has learned from his mistakes in this case.
If you simply cannot wait any longer, pick up this version. If you've got the patience, wait till next year, when MGS2: Substance comes out. It will be a much more complete version on the game.