I just have the urgent need to bother you with my 2 hours of experience with the R.A.T. 7 which i bought today.
Seriously, i had already a lot of mice, I always had to get used to a new mouse. BUT WTF, i just plugged in, fitted it to my needs and voila, no need to get used to it, i just play BF3 1:1 as I played bf3, no matter if flick-aiming, high speed moves etc. and i have really 0 tracking loss!
So, if u have still some money left from ur christmas-gifts
i really suggest this mouse.