I live in a very old house and we have always had issues with little critters scurrying through the walls of our house whenever they feel like it.

I set this up in our living room, that's where we seem to hear them the most, I've had it there for about 2 weeks now. I didn't notice a difference right away but after the first week we did notice a slight change in how much we could hear them. We have also had problems with bugs finding their way into our house, we haven't seen any in our living room since having this.

I only ordered one of these so I think that I will have to order more to see even better results. I purchased this at a discount from Amazon.ca and I feel it works ok but I think I need another unit considering I have a large living room.