Recent Review: We tried to use an Invisible Fence to keep our two-year-old German Shorthaired Pointer and three-year-old Pit Mix in our yard. It didn't work--not even a little bit. When we told Pet Playgrounds this, they were more than accommodating--especially when we stressed that the Pointer is a TSA Explosive K9 and we CAN'T have him getting loose. Victor and his employees (and his adorable 10-year-old Golden) showed up at our house early to install our fence. So far, the dogs have LOVED LOVED LOVED having their own personal dog park in our backyard. The MAX Strength was definitely the way to go as both of our dogs are chewers and Houdinis. They can't break through the fence. They can't chew through it. They can't jump it. They're totally safe and confined to the backyard. It's fantastic. I'd highly recommend Pet Playgrounds to anyone interested in keeping their dogs in their yard. It's way less expensive than a traditional fence and it's far more reliable than an electric fence.