The lights are on
As a guy that has taken guitar lessons and been playing for about 20 years off and on I can truly say I enjoy this game. I did have to hook the audio up with analog cables directly to my headphones (I have nice headphones so the sound is very good) to avoid the delay between plucking and hearing the sound, which is a bummer because I have a decent surround sound set-up and it would be nice to use it.
I didn't think it would be possible to improve on Call of Duty 4, thankfully I was wrong. After all the hype and build up, Modern Warefare 2 has delivered.