Seems to be working well calming my cat who becomes quite aggressive when needing to be handled. (Took him in at approx 12yrs old so previous history unknown) He is still aggressive but slightly easier to handle which was very necessary as he has needed medication due to illness. Not really affected my other cats, however they have different personalities and are generally calmer than he is. The smell takes a lot of getting used to. Still don’t like it but few other plug ins and candles can mask the smell.