So Far So Good!
I own a 4.5 yo border collie who used to bark a lot when we were absent. I have used the collar 6 or 7 times in the Temperament Learning Mode. So far, the level still remains at level 1 and I can advise she has not barked at all while we have been absent. So, obviously I am totally satisfied. Well worth the cost! I also wish to advise the customer service I received prior to and during purchase was excellent, and the collar arrived very quickly after purchase. John Massey