This product was amazing from the day I plugged it in! My Siberian husky would destroy the house whilst I was at work every day without fail regardless to what I left her to chew, eat or play with. I plugged this bad boy in and have come home every day since to not one thing touched and a happy girl asleep with the cat on the sofa. Even the cats more chilled and loving. I can smell it slightly but it’s a nice smell and not at all offensive. I would highly recommend trying this plug in.