Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: These things are worthless!
Review: The suction cups on BOTH of units I received are nowhere NEAR smooth enough to function at all. Even on glass with plenty of water to help seal, they will not seal at all. If these things USED to have smooth suction cups, it was way before they were shipped anywhere from the factory. They come in a flimsy box with NOTHING protecting the rubber cups from abrasions in transit. Don't waste your money on these pieces of crap! I'm going to try to use a rubber adhesive to bond the perimeter of each cup to wax paper or plastic wrap, then peel the paper off and hope I end up with something usable. :o( !!
