Clive
I have to say it has a very poor record for sure.
The biggest problem in my opinion is that the bikes should have seperate slots to the cars.
I was shocked at how many bikes just crawl all over you, what you do learn is to pick the right slots when its quieter.
A bmw estate spun in front of me and ended up siadeways across track just around a right hand bend, i missed it but bike behind me hit it big time, not pretty at all.

I honestly believe if you treat it with respect and dont go out thinking your nigel mansell then you will be fine.