Just re-installed it. Icky mouse accel that you cant turn of makes it unplayable.
Turn down the sensitivity.I did, i have 3/11 windows sens, CPL Mouse Fix. No trace of mouse accel on my system.
1/10 sens on Deus Ex...
Deathadder. Have tried my 518 and it still felt the same.
are you using the GOTY edition? Do those mice have drivers?