It works! Was a lot of hard work to install. The installation tutorial was good info. Using a flat head spade shovel saves a lot of time. You don't need to bury it 6 inches. We bought 2 extra spools of wire making the distance 1,500 feet. After twisting up some to cancel the signal near the house we ended up with approx a 1,300 loop. The dog has learned to boundary and is staying inside. She runs a lot and it is working great. Took level 3 (out of 5 levels, 5 being the highest) for the dog to respond. I let it shock my hand to test it and it's a little startling but it's not bad. Plus the dogs skin and fur is thick. I highly recommend this product. Way way less cost and labor as compared to a fence. And fences are ugly.