I got the G25 and as we put it , its like driving a truck.
Compared to one the old sidewinder steering wheels i got the G25 is a steering wheel you fight with all the time.
Using it on GT is not easy, i have had to start the game from stratch and do the license from start just because the steering wheel is just not easy.
Attempting to do the clutch with manual is and will always be hard, i do not know why( could it be cause of no g's on your body, or the feeling of an engine like you would in a car) but all i can say it adds to the entertainment.
These wheels are really not for messing around, the amounts of energy i have to find to be able to make the car listen to what i want to do is a mission, the wheel is so strong that it really messes my races up.
There is another game which i use it for street legal racing redline, which makes the game actually a whole lot of fun.