I installed them in 2 bays to try them out. I like the idea & design, they seem to be well built.
Do they increase revenues? I dont think so.
Do they decrease weep washers? Some, yes, but not a lot. Mostly the fact that they have to hold the head of the brush steady just angers most of the customers I see doing it.
Do they stop people from using the brushes on tires? Nope.
Do they reduce wear on the brush heads? I dont see a difference.
Will I buy more of them? Not at current prices, no. I like the wobble head, I'm willing to pay more for them. But nowhere near the price they ask.