A couple of us went out in the GTRs for a pedestrian lap, just to say we have done it, which was good.... torrential rain, rivers on either side of the crests, etc. Have also done a lap in Leaf which was a bit weird, especially the carousel.....
Not a track I would do at pace in the GTR without knowing the track, so many blind turn-ins or braking zones that if you miss you are in the barrier.
They do rent track prepared clios, etc which are supposed to be good fun and you get an instructor, so if you do feel like trying your luck, use someone elses car. Be warned, the excess is a bit excessive