Those types of carwashes are terrible for your paint. The BMW dealership(automall w/ other chains too) had an autowash that they wouldn't allow the BMW's to run through. Those brushes are covered in 1000's of washed worth of dirt, and grime. They just grind that dirt all over your clearcoat creating tiny surface scratches that will look like hell in the sunlight.
I would say that using that wash is counterproductive, because it's damaging the clearcoat.