Just drove a few laps, and to me, they suck
Reason,
I use a G25 with shifter in H mode for other races. When I keep same settings as with any other race or car, as soon as I touch my flappy pedals, the throttle goes dead
To start, I need to push throttle, and put shifter in first.
When I make a off road trip, somethimes the same thing, throttle goes dead.
I must say, that they are indeed something else in terms of physics. They go around 180/190, but manage to be a lot quicker then a Renault Megane on Mid Ohio. First lap out with it, I was a second ahead of AI in 95% mode. Braking is fun, about half the distance of a megane is needed. Steering in corners is quick as well, as long as you keep a little pressure on the throttle.
All in all, if the problems with the engine going dead can't be fixed, they suck. Otherwise, they are good fun for a difference in driving.