8 sensitivity with accuracy at 27% without the freeks.
I haven’t got in my other copy to try them on MW2 but I asked another guy in the COD thread to try them on 10 and he said he had no trouble playing that when he normally ran 5 without the freeks. I’ve tried them on another FPS and did notice that my time it takes to aim has slightly improved. Personal experience varies from person to person but so far everyone that’s gotten them on SRK has really liked them. I was initially trying to buy a used pair from a member and then he turned and said he likes 'em and is going to stick with them.
Oh and on the getting used to them, I think that varies as well. I have some people saying something different than what I had. I got used to them pretty much the second I put them on.