Just started this, must say a truly amazing game in all aspects. If you like this sort of game that is. The only thing I have found is that I find it very intense, and there fore can only play for about 15-20 minutes at a time. The four runners of the game, and many other games I could think of, I could play for hours on end.
I found the intensity the very reason why I could play it for hours on end!
The only thing I can't do is play multiplayer for hours without a break. Typically I only play 1 game and do something else (like peruse PC Advisor...guess what i've just been doing!?!). Mostly the reason for taking regular breaks in multiplayer is that I'm not very good, so get frustrated with losing!
I've recently bought Bad Company and working through the single player, which is great! But when I go to Multiplayer, I find the server browser very difficult to negotiate - usually I get the message 'Can't find any games...' and then suddenly there is a list of servers and I have no idea how I stumbled across them!