It's also a buggy piece of crap on windoze. And it doesn't seem to be really good, I guess it really is a WiP.
It's a little bit more mature on Linux, but still, for all the talk of the great physics on it, I thought the car handling really sucked. (This spoken from someone who has driven a few high-power rear-wheel drive cars... I can say that their models may be close in physics, but not in the reality of how a vehicle behaves.) (Of course since my analog joysticks don't work right in Linux, I was playing with the keyboard, so that didn't help matters much)
I had nothing but problems with the Windows version, though my analog sticks worked. :-P
In short, though, I'm glad I'm not the only one who was quite disappointed in this effort. It's still got a lot of work to be done.