We wouldn't let anyone drive either of our sports cars. There are some reasonable exceptions, but it would be unusual to have it happen. We know of one fellow who left his $100,000+ car at the dealers with explicit instructions that it not be driven off the property nor out of the dealership's repair building. He explained it had many modifications on the engine, the owner of the dealership was in agreement. A specialist from another Dealer also called and advised how to do the specific work needed for this guy and again don't drive this car anywhere. Sure enough the "writer" had to give it a try. He "left the road" at approx 75mph, the car is totaled.
My XF is pretty darn close to perfect. If it were to get mistreated or worse yet an accident I don't think I could replace it, I'd be really really "effected" and be looking to affect the person who did it. The car is a pleasure to own and drive. Except first gear

 

Skip it. Around town, I usually just do 2nd, 4th, 6th. 1st only if I'm on an incline.

 

Parroting the guy who commented on Vegas above, you really want to valet your car in this town (except on a busy weekend evening when you'll have to wait a half hour to get it back). The self-parking lots are ding magnets with a bunch of beaters parked helter skelter. He's also right about the valets wanting to avoid any customer complaints and therefore treating your car well. A valet position at a high-end hotel with an acceptable shift is a six figure annual job. I know one forty year old that's been doing it for twenty years--$300k home and kids in private school.

 

My son used to work at a local car dealer as a lot attendant. He did horrible things to other people's cars, including teaching himself how to drive a manual transmission. He tore the mirror off an Armada, scraped up the side of a "Z" by going through a curve in the road "a little hot" during a refueling run. He also learned how to improve his gas mileage by drafting semi's on the highway when he did dealer trades. He claims to have been one of the more "tame" drivers. Based on his stories, he was probably right.

(and, YES, I did tell him he was an a$$-hole!)