Our back yard is about a half acre fenced in and even still, we were having major problems with one of our dogs (65 pound golden retriever) breaking out to “protect us” from the neighbors and other neighborhood dogs walking by. It finally got to the point where we couldn’t let her go out into the yard without a leash because she would immediately b-line for the fence and start trying to dig under to go roam the neighborhood. We laid the fence wire and flags along the base of our existing fence and spent a lot of time Day 1 and day 2 walking her along the perimeter on leash showing her how it worked. We are now on day 5 and she runs around in the back yard like normal but will no longer go within 4-5 feet of the fence. FINALLY our pet is contained!As for the quality of the product itself...So far so good. I’m sure it’s not the best quality invisible fence on the market, but I can say that it definitely does what it’s supposed to do. I ran the wire in through the side of my house so I could mount the unit itself indoors to protect it from the weather. I laid 600ish feet of line and spent about an hour today burying about the first 100 feet or so. No issues so far, but my biggest concern is if I end up with a break in the wire. Part of me wishes I would have purchased higher gauge wire to help prevent this, but I guess we’ll see how well it holds up over time. For now, 5 stars and no complaints. Excellent purchase.