We live in a condo with an enclosed shower with mold and humidity issues. After every shower we squegee the glass and walls to minimize the moisture left behind. The Karcher product we purchased removes about 3/4 cup of water from the glass and tile walls of our shower. One hint for use- hold the vaccum parallel to the surface. If it is not held parallel and the bottom of it is not close to the surface, it works more like a squegee with water streaming down the walls as it is being used.
Wife loves it and that is all that matters, she is in high gear with the spring cleaning. This product was first shown to her by a friend that had used it in Australia while on holiday for 3 months. They must be the rage down under. When she returned to the US she ordered one herself. They came over for a dinner party and she washed two windows in our living room. And my wife was sold and had to have it.
I have a professional cleaning company. We clean hundreds of homes. Some of them are awful. So we have been looking for a quick and efficient way to clean windows and make it easier on ourselves to get the job done. I think this product seems to works for us. Let's see how durable it is and how long it lasts.