I Haven't played that but I'm dying to. I've always wanted to play FPS games but get dizzy from the unatural movement. I tried teh Resident Evil 4 and it doesn't get me as dizzy and getting better.
I guess if you're used to controllers and keyboards then you have a preference but I'm pretty much giving my experiences from 5 mins of gaming. Controller, keyboard and Wiimote. But RE4 isn't a true FPS yet. I'll chime in again when I play Medal of Honor. Metroid looks pretty cool too.