Depends on the kid wiping down your car.
The last "managers special" at $29 bucks was, well, less than "special." They do a decent job; yet, I'm not sure if the stuff sprayed on the car with the flashing lights is anything more than soapy water.
It's NEVER as clean as you'd do it. . .but you're not having to do it.
And frankly, it seems like the worst scratches tend to show up afterwards. Maybe they're easier to see on a clean car? OTOH, maybe the high-speed, rotating thinga-ma-jiggers have a rock in there somewhere?
Either way, the staff is ALWAYS nice. . .if not a little overheated due to excessive sun exposure.