Bests & Worsts Reviews from Amazon

Received collar and within minutes had adjusted to fit my 12 week old dog and started with correction set at 2. I walked him to boundary to introduce him and collar tuned on and shocked my dog for at what seem for a solid minute and would not turn off, just continued to shock my poor dog. Yes I removed him within seconds from boundary line at least 20 feet from it and continued to shock him. I myself got shocked and bitten trying desperately to remove collar while its shocking the both of us.. Now my dog is scared to even go outside and took several hours of loving on him to relax him afterwards. I purchased Petsafe fencing 3 years ago for 2 other dogs without any issues what so ever with 2 other Petsafe collars. Purchased from another suppler/ storefront. Not sure what issues is but I do not trust this system now for my dogs safety now.