I bought this the other day because I really liked the scent in the store. I was really excited to put this in my car. It clipped in really well and I like that I could adjust the settings. I drove around all day with it, and couldn't smell anything. I adjusted it and still nothing. I've had it in my car for a week now and nothing has happened. I must say I am pretty disappointed with this after reading all the great reviews on it. I may have just received a faulty one, but just wasted $5 as I was unable to return it for a replacement.