For those that are thinking about buying the retail version (as I did) you will be more than disappointed to know that only HALF of the files are on the Disc. You still have to D/L about 5 gigs off of Steam. Lame, just lame.
I was very pissed off about this. The reason I got the retail version was so I wouldn't have to waste time downloading the game. Then i get it home and install it just to find out they only put half the game on the disc. What is the point of selling it on disc if you are only going to put half the game on the disc.