Horrible, but looks nice. Don't try to play this on anything but a 42" + widescreen.
Don't want to get to wordy, but the gameplay gets boring quickly, you don't have any real sense of accomplisment by the time you get the the final chapter.
Graphics are nice, a true underwater feeling, but a real sense of disconnect from the story and characters. Totally uninspired gameplay, and a waste of 10 minutes of download time. If wanted to shoot things, I'd try to find a download of space invaders for my laptop.
The only reason I gave it a two is cause for about 2 seconds I thought the underwater graphics were cool. The AI is very dumb....with no real purpose but to get in your way as you try to take the points in the game. Even with the game being free to download from Microsoft in the window granted, it was a poor choice (or a brilliant one) to chose.