A game that has lots of variety in gameplay, perhaps the best in the series.
Many have a preference over which is the best game in the series, I think MGS4 is mainly for the gameplay. You can either use lots of stealth, some shooting, or just stealth. All the items are fun to use and some of the boss battles will take some strategy. While the writing is as bad as it's in most MGS games, I thought the set pieces were best in the series. It was all fun.
My only problem with it are the long cutscenes in the game, for anyone that's never played an MGS game this can really confuse you. Still the game is enjoyable and I think most will have fun with it.
I thought the Octocamo suit was very well implemented, it made it feel like you're really in this futuristic world. The MK robot is also fun to control and use.
Another problem are the shooting mechanics, they are kind of weak, but if you want to shoot yourself through the game you can do so as well.