“They are very effective. We had to remodel our bathroom. Which resulted in the floor having to be replaced also and that opened it up to under the house which resulted in having unwanted guests! I saw the add and said yes will try it. I have 2 dogs and can't poison the mice because if the dogs find them dead and ear them then I have that to deal with. We live in the country and there is all kinds of places for the mice to live breed and keep spreading. I didn't want a bunch of traps around for the dogs to get in and like I said no poison. So when I saw these I was intrigued to see if they worked. Well let me tell you I don't have mice in the house the shop or in the rv my niece stays in. So yes if you are looking for something that works and won't hurt your family or your fur babies. And the smell is actually refreshing. Just wish they lasted a bit longer but over all I would rat them a 4. Thank you for saving my house and dogs from the unwanted guests.”