Bests & Worsts Reviews from Amazon

- Large delay in shocks stopping once collar is returned to pet area. - Seemingly random warning beeps when collar is well inside pet area. After setting up the transmitter, I encountered an oddity while planting the boundary flags. At some locations the receiver would start to beep and shock as expected in the boundary zone, but it wouldn't stop until I carried it 15-20 feet back into the pet area. It would not start shocking in this 15-20 foot range of the pet area, but it wouldn't stop shocking either. This was happening on a roughly 50 foot arc of the boundary. I contacted customer support by phone. The guy told me that there may be a metallic object underground where this problem is occurring. Adjusting the transmitter power slightly may help avoid trouble areas. Though doubtful that my gravel driveway and half of the front yard was sitting on top of a large hunk of mystery metal, I couldn't prove otherwise. So we gave it a try. When trying to hammer a round peg into a square hole there aren't a lot of options. We tried what transmitter locations and boundary range settings would work on our property. None of the alternatives solved the problem, but we decided to give it a go anyway. I placed flags well inside the perimeter on the screwed up portion and began training the dog at a more reliable part of the yard. The shocks did a great job of keeping our dog, Helmut, inside the perimeter. It took a good deal of coaxing and bribery to get him to come near the flags a 2nd time. We got him comfortable on a spot in the lawn five feet inside of a flag. The collar began beeping after he had been sitting motionless for a few minutes. Helmut ran back to the patio and wouldn't come back on the grass. We pulled the flags up and put everything away for a couple days. For the second attempt, I took lots of time to be extra careful when placing the flags. 1) I would lay the receiver on the ground when it started to beep, and drag it along the grass until it stopped. This spot would be double checked. 2) Then I would place a flag 2 feet inside of the spot where beeping stopped. 3) Finally, I'd kneel a foot or two inside of the newly planted flag while facing it so my body was between the transmitter and receiver. Then I'd roll the receiver around, and gently press it into the ground to make sure there's no way it'll beep inside the flags. I fit the collar on Helmut and brought him out again. He laid in the grass just off the back patio, around 20 feet inside the perimeter. I sat down by him with a book. After maybe 5 minutes of neither of us moving, the collar gave a warning beep and Helmut jumped up which prevented a shock. He then went crazy clawing at the door to get back inside. Random electrocutions to motionless dogs in the pet area was not a feature I saw advertised on the box. I highly recommend this product to anyone who lives in a straw house on a perfectly level circular lot during a full moon.