Flight car does not adequately disclose that they charge a $300 deposit, that they rent high mileage cars - mine had 126,000 miles, that they limit mileage to 100 miles a day and then charge 45 cents a mile. They do not disclose that they do not pick you up at the terminal. They use cell phone lots, airport shuttles, and unmarked cars. If you are at all concerned about your personal safety I would not recommend them. They do not maintain their cars. They don't even wash them. I had to jump my car twice because it would not start. When I checked in there were two other people with me. Both of them canceled and went elsewhere when flightcar told them about the mileage cap and the charge for excess miles.
Executive summary: unsafe and unreliable.