I've been sewing so while I was sewing, DD and her pal BJ took the Muddy Puppy Dog Wash for a trial run with my grand-dog .
works pretty much like the car wash. Put in $7 to get started. You can select different shampoos, and stuff, and use the sprayer just like the car wash.
So DD says that overall it's a good thing. If she could improve it, she would have a pause (paws?...hahah) button so she could scrub on the dog a while and not have time continue to run out, because just like the car wash, you always run out of quarters before you're done!