After I read the reviews, I got myself the Bautrockner and am totally satisfied. We have an old cellar and struggling to keep up with moisture. Once the basement is always colder than the ambient temperature, is repeatedly moisture in the walls. We have to vent about 2 weeks now in use and have determined pulled over 50 liters of water from the walls and around.
The Bautrockner is not exactly quiet, but very effective.