I saw this product in a pet store and decided to go online to read the online reviews of the product before I actually bought it. All the reviews were surprisingly positive so I figured I'd try it - why not? At least, I could listen to it and relax even if the animals didn't. Well! My two dogs (a shep mix and an akita mix) and the two cats were actually listening and then they went to sleep! It really did calm them down!