Overly hard game = lazy development team
A lot of the controls require too much precision, you're not given enough of the types of ammo you need and in a lot of cases, missions are time sensitive!
It would be nice to have at least had more save points instead of having to finish an entire level before being allowed to save it. This is a sure sign of lazy game development. Instead of making a rich story with fun game play, the developers chose to punish gamers for being less than precise and make them have to play entire levels over and over again. This make a game seem a lot longer than it actually is (see also Battlestar Galactica). The graphics are good, but far from the best the X-Box is capable of. THe story is a bit shallow and hence the repetitive gameplay to stretch things out.
If you are a masochist and like tedium, I highly recommend this game to you.