It's sooooooo good...
To start with, the graphics are some of the best I have ever seen. So much detail is added everywhere. Every arena has detail beyond the imagination, complete with worlds floating around and jam packed full of high level AI.
The gameplay is excellent. It is a strange plot ( if you can say it has one), but that doesn't bring the game's score down at all. It's fun, action packed and thrilling and will have you shouting at it whether you win or lose.
The sounds for each arena fit the surroundings really well, create atmosphere, tension and suspense. Which, of course, are key elements in games.
The game is really worth playing, worth buying and keeping for years with any other amazing shooters that you own.
Excellent for the money you can get it for today.