just to add if they ask you if you want extra insurance for £25 or so do it. then if you crash or damage the car you can just walk away, one bloke smashed the wing mirror off a LP640 and had to pay the exess.
where i went the cars were a little worn and the brakes warped to hell but as long as you didnt drive directly behind the car in front you could do what you want.
if you can do a rally day do that as well, there so much better and will make you really think about your driving ability as there care the life out of you