So far so good. Will update in 1 week after we have it for a couple days.Side note: I have Siberian Huskies and they are high strung and will dive straight for the fence. Installed the fence in front and back yard and tested to make sure the collars were activated throughout. Then put the collars on the dogs and wow did it make a difference. The first few minutes I walked the dogs around and showed them. Immediately my girl (who is the escape artist) headed for the fence and immediately backtracked when she was shocked. Now she is a tester, so she attempted to map out the yard "to make sure" we didn't miss anything. She was shocked a couple more times and then stayed away from the fence. Then the big test. We took them out front where there is no existing fence and walked them around the yard. Now usually I cant put a leash on them without them dragging me and jetting down the street (probably a funny sight for the neighbors). They tried to do this and immediately after the shock came back and sat down next to me. I was able to let them roam the front yard without a lot of supervision! AMAZING!!!