Except for some extra wire that I added, our system is a basic Petsafe system for one dog. I bought it at one of the big box stores, H.D. I believe, and it lay in the garage for about six months until I became motivated enough to install it. Took the dog about 3 to 4 days to learn the boundry. I do know of two other similar petsafe units nearby about 5 years old that have had no problems. Good Luck!