My opinion about the karts, they drive pretty good.
To get more of a real kart feeling, I have put the center-spring on 60% in the Logitech menu (I have a G25).
As karts have a massive amount of self centering due to the way the front wheels are connected, as they are tilted backwards to the frame. They steer really heavy in real life, much heavier than most cars.
Braking could be better, it seems the kart is heavier than in real life.
Maybe some numbers are a bit fudged to get the proper handling.
But these karts brake quite bad, compared to the grip I "feel" in the corners.
Not much room for braking in to a corner and putting your backside in.
It's a bit all or nothing, everything in the middle is a bit useless (on CST's with a loadcell).
Maybe the compression of the engine is not counting as much as it could also.
Deceleration while braking should be a bit higher, in my opinion.
Also i see "toe in" available for the rear wheels, that's a bit odd as the rear wheels are both connected to a single fixed axle. So not much room for toe in, only ride height/width should be able to be adjusted.
Still very impressed by the handling made possible on the trusted gMotor platform.
