I have the full game, and, I gotta say, it is AMAZING! Not only is it a remake of one of the most best MGS games, but it really fits with the gyroscope, and the graphics are amazing. The main difference is that you need to rely on stealth than rather beating up anything that moves, otherwise it may end up in some horrible results. This game uses precise movement and strategic gameplay as Snake sneaks his way around some of the most toughest enemies he may ever encounter throughout the game.
This is an example of poor porting from Playstation to DS platform. The beginning cinematics are fantastic, but I couldn't even climb a freaking tree in the beginning of the game without getting frustrated and almost breaking my DS! The controls of the game is terrible. Whoever thought that giving the right side (YXBA) buttons to control camera angles is a great idea, while the up button does a million things is a genius (not). Anyway, bottom line, good looking game but make sure you configure the controls otherwise, don't bother