It's worth what it promises. In no time the mold is gone. After moving in, we realized that it probably has previously given mildew in the bathroom. Have then AGO bought and applied: Super results. HOWEVER: It is crucial to ventilate !!! Because this choir vapors have what it takes. I recommend: Tighten jacket, hat and scarf and really pulling for care (swipe course outside, not indoors). Even after this long (!) And ventilate. Is also an ideal exercise for the future: Schimmel avoided by airing! - Seriously: We know the negative remarks of a known test Institute and see it quite differently. Are very satisfied with the mold remover. After the chlorine odor is gone, the air is whole lot better by the lack of mold, and it just feels better. But just: Exercise caution when using - do not take it lightly. And yes (!) Never insert the brush in the bottle !!! Then the stuff is useless after a short time. Always something Mildew in a clean glass pour - and then nothing back into the bottle!