The thing does the job perfectly, we are absolutely delighted and have already ordered several times. Once there was a small but very unpleasant Maleur my cat on the old sofa, we wanted to protect our new sofa. Having read many things on the Internet that are not really convinced, we came here to Katzenschreck. And it works. Once we leave the sofa, it is situated. Initially tried the cat, still to come on the sofa, which could be heard on short hiss of the spray, now it comes only on the sofa when we sit on it. Cats education successful !!!!