From hotels and restaurants to private residences, I've used American Valet dozens of times since I've moved here 2 yrs ago. They're very professional and do a great job. The prices are reasonable too....when you have to pay, it's typically $5 to get your car parked...not bad.
I always leave a few bucks in my ashtray compartment to see if it gets stolen and it hasn't happened once with these guys.
When I'm in need of hiring a car valet company, they're the first and only people I call.
Return Factor - 90%