just a quick pic of my setup
and a closer look at the wheel
whats great about the wheel is that, you see the red dial, you can program that to adjust things on the fly, so in gp4, i have it adjusting the brake balance, so i can go from one setting to another depending on the type of corner, just like real life
The rest of the buttons are fully functional, i sometime just press a button while racing, just because i pretend to change a setting or i'm on the team radio haha!
Force feedback is excellent, supposedly just as good, if not better than the G25, but i've got no experience of the G25, so i can't say.
But definitely, the G25 is the better of the two i believe