Very satisfied with this product. I was easy to set up and works amazingly well. My adopted dog came trained to the "Invisible Fence" so this worked well for him. I was mostly impressed with how the "level" setting is so precise. Slight variations in the setting are readily seen when testing the collar,, down to like six inches difference in activation distance from the wire. I also strung the wire on a chain link fence my dog had gone over previously. As an old Ham Radio guy I know that placing an antenna near other metal objects severely disrupts the efficiency. In this case, as stated in the manual, it seemed to make no difference, worked perfectly.