If I could give no stars....
First of all, I'm very glad that I had decided to purchase another product and return this one.  When I got the product and took it out of the box, it looked like it had been used. The suction cups were dirty and there looked like dirt residue around the filter housing. Then, when I went to install the unit on my tub, the one suction cup was faulty and I had to switch the the suction cups around in hopes of getting the unit to stick, but when I replaced the retaining clips used to hold the suction cups in they didn't lock back in place!  So I have the unit barely holding onto the tub. When I turned the unit on it makes the water swirl around the tub and my wife thought that it was just ok.  During the return process Amazon customer service had given me a refund but told me that I could keep the item and I think I see why...not worth the postage to have it returned!
Rating: 1 stars