Left my prius there for a week because of construction in the main lots. BIG MISTAKE. Place seemed pretty unorganized and the driver didn't even know how to start the car; that should have triggered suspicion, I suppose.
When I got back eight days later the car wouldn't start. The check engine light was on, other prius specific warnings, too. After a few attempts the car started, but the warning lights did not go off. The car is five years old, has been maintained per prius suggestion list. No problems ever. Who knows what they did to it.
I tried to talk to the manager, Teresa Jones. She was extremely unhelpful, did not assume any responsibility, did not call assistance, in the end she walked out on me. I got on the interstate with these warning lights on.
Avoid this place. Leaving your car in a Wal-Mart parking lot is a better option.