A great improvement over the last game
MGS3 adds a bunch of new and cool features. Like they got rid of the radar so you'll have to rely more on your smarts and tactics. Also they added a new jungle envrionment other than an indoor, idustrial one. The AI in MGS3 is also better. Your enemies will fool you as much as you fool them. They willl hollar out if they see you, the guy with the radio will take cover and call for backup, it's all an improvement from MGS2.
But the problem with MGS3 is the camera can be a bit frustrating at times. Plus you're alot stronger and you can really take alot moredamage. Which makes the game a bit easier but then you could almost just mow down your enemies at some times.
Overall MGS3 is a game that is really awesome and addicting for anyone. I can't wait for MGS3:Subsistence to come out.