For years, I am looking for a functioning wiper. My old man broke down before felt 10 years. Then there was immermal again strip washing windows. Once the sun was shining, it fell on. This comes to an end. The Unger S wiper is awesome. It glides over the window and without stripes. Especially large window can be clean well, although I may depart from top to bottom or from left to right. No matter how - simply ingenious.