Only thing I wish was that these things were more durable. Being on a dog it tends to stop working even though i hit the test button and see the light go on. I think because the lid just needs to be tightened again. Overall though its so nice letting my dog handle his business independently. He sneaks out when im sleeping and takes care of business not disturbing me at all. This collar and the door it goes to allows my dog to be fully potty trained.