I've done it 5 times as a corporate event for our customers. Not for the last few years though due to recession and the fact I was beaten by two girls last time
My favourite event is the single seater, now that they have the paddle shift box you really can run them properly through the gears. The grip is unbelievable, when you think you just cant go faster, you can! The instructors are top notch (Lewis was there our first year) and they push you harder than you would push yourself.
An intense experience that our customers still talk about years after and I have not found a better event anywhere in the UK.
The new video & telemetry feature looks brilliant, now you can bore everyone else with your laps. Enjoy!