My mate offered me a FragFX V2 a couple of days ago for my birthday, I tried it quickly on Killzone 2 and it's OK (some latency though, but this game is an exception as I read it on various websites), on Battlefield 1943 too and it's really great.
I think it needs some time to adapt, but my first impression is clearly good.
Although I wouldn't use it with Uncharted 2, cause it's not a FPS and doesn't really need a mouse to be played.