This game is probably one of the top 3 games ever.  I personally rank it #1 and GoldenEye as #3.  The reason this game is so awsome is because of it's movie like qualities.  For a maximum impact, you should play this game in long stretches with as few distractions as possible.  This will litterely put you inside the movie.  The plot is just awsome, and it gets better as it goes along.  It took my about a year to beat the game, and a total of about 50 hours of gameplay.  I did stop playing it for about 6 months win I got stuck on a level, then stopped for another month when I got stuck on the last couple of levels.  I still think they should make a movie series of this game.  Overall, I think I would pay about ... if I needed to to get this game.