Just got my wheel a few days ago and I am fiddling now with the settings to adapt them to my liking.
Great difference comparing to my G25, I like the GT3RS V2 already.
Game
----
FFB - 5
Steering - Simulation
power steering off
abs - 1
all other assists - off
Wheel
-----
Sensitivity (SEn): 270 ( for RM cars ), 360 for the rest
Force feedback strength (FF): 100
Vibration strength (Sho): 100
Drift mode (dri): off
ABS: 90
Linearity (Lin): 0
Deadzone (dEA): 0
Spring (SPr): -3
Damper (dPr): -3
Have to change the setting for accelarator and brake pedal too though.
Too soft for me. Need more resistance for a real life feel.
Latest settings that provide a lot more control due to reduction in sensitivity from 900 (maximum setting) to 360. Linearity increased from 0 to 30 to reduce oscillation due to much lower sensitivity setting.
Game
-----
FFB: 5
Steering: Simulation
Power steering: off