My neighbors on both sides have it and it works well for them. They both have labs. But I have friends whose little dog will go right through it.

I tried it for Hannah and it terrified her. She didn't even want to go outside. When I forced her outside she stuck right up next to the house. I decided this was not for my dog, so had them take it out during the trial period. A problem can occur if there is a break in the line. Then you'd have to find the break and fix it. We finally had our back yard fenced in. We used a spit rail with a wire mesh attached. Works beautifully and I call it the best money I've ever spent. RuffRuff is right. Keeps the other dogs and kids out.