Absoloutely amazing!
MGS4 is the best game I have ever played, I honestly can't think of anything the game could really have improved on. The gameplay was immersive, soundtrack was spectacular, graphics revolutionary, cinematics amazing, and the sheer creativity of the game blew me away. I somehow played the game about 8 hours a day for three days, even with football, physical therapy, appointments, and other things.
When I played, the game really sucked me in. I became Solid Snake, feeling the shots, and recoils. It then came to me that anyone that dissed the game was probably an Xbox 360 fan boy.
I'm still in awe over this game, and would highly recommend it to any PS3 owner.