I use the DFGT. I can't say I'm a huge fan, the gas peddle feels cheap as all get out, as opposed to the brake pedal which feels really good. It has resistance to it that I appreciate, where you actually have to impose some force on it to compress the pedal, and it decompresses nicely as well. The gas peddle, however, merely resting my foot on it slightly will send it straight to the ground, and since it takes no effort whatsoever, it's far too easy to forget or underestimate just how much you're giving the car at any given time. I just don't like it.
Also, the fact that the wheel will make a full on rotation when you go off road is endlessly annoying, especially when you think about pausing the game, the thing resets itself on its own... ??? Why did you bother moving in the first place if pushing the start button puts it back to the original position?
My biggest peeve comes from one feature that pisses me off to no end. I don't know if it's Logitechs fault, or PD's fault, but having to push the triangle button to reverse drives me absolutely insane. I mean, I'm ready to kill someone when I get punted off the track, so I gather myself, have to reset the wheel because as I stated above, it moves on its own, then awkwardly position my hands to push triangle and hold it while turning the wheel at the same time. What? You mean in this day and age, with a $150 wheel, I'm still pushing the analog buttons to make my car go backwards? Excuse me, I'm sorry, but not being able to shift down from first gear to reverse is the stupidest thing I've ever heard of...