This product has been beyond amazing!!! It has met every expectation and has save all 3 of my dogs lives!!! We have 2 Great Danes and 1 Boarder Collie. They were escape artists and they got into my neighbors sheep the first time took out all of mine the second time too. We considered building higher fences however the cost would have been huge. We spoke to Colin on several occasions, he was extremely helpful from reassuring us to talking with us about training and instillation. If we had any doubts or questions he solved it. Best service I've had in a long time. The product is even better than you expect!!! 10/10. We were skeptical as all 3 of our puppies were the worst trouble makers. We are at a point now that we leave them to roam the yard around the house without anyone being at home. We tried and over night stay and it all went smoothly!! I cannot suggest any product more that Dogline. It has saved me many troubles. Thank you to Colin and their wonderful Team xx