Cobalt fun is better than no fun.
I'm just talking smack though, I was actually very happy with the experience. I learned a lot more than I would have in the E30. This track is so scary that with a really fast car, your knowledge and abilities better be up to par - it's not the place to push those limits. With the cobalt I was able to advance my feel of traction, suspension limits etc by a century. By the last few sessions, other than an M3 on R comps, no one was pulling on me in corners. My instructor laughed out loud when an R35 GTR flew past me going into the Carousel and I was on his ass by the back straight. Then again when an E39 M5 caught up to me on the front straight but not close enough to pass, but by the time I exited the esses he was barely in sight. I'm not saying anything about the Cobalt vs a Skyline or M5 but I am saying that while I learned by leaps and bounds, those guys were still scared to push their super fast expensive cars on that track.