I bought this product to use on my backyard lawn to keep the dogs from digging huge holes during the wet winter. It takes a bit of testing to find just the right spot to put the rock. I have two rocks for a lawn which is about 15 ft x 40 ft. I have had the product for 5 months. But it works! Some people may say it's mean to the dogs, but it's mean on me to spend hours and hours filling in holes and replanting the grass and I don't like being angry with my dogs.
I just bought one more rock because the dogs decided to dig on the edge of the barrier area. The batteries are expensive. I have two collars and one quit working after about 4 months and Petsafe replaced it for free.

I own 2 German Shepherds. 1 that's 2 years of age, and another that is 8 months. I just recently spent a lot of money landscaping the yard and I planted flowers where the puppy enjoyed digging on the regular. I just got this yesterday, and she already will NOT go near her digging spot. Yes! I will be getting another one of these rocks for when I start my vegetable garden! I'm very very very satisfied with this product and would absolutely recommend it!

The only problem I ran into was she went into the range of where she shouldn't have been, I heard the collar beeping, but she wasn't reacting. So I looked in the book that was sent with the rock/collar, and it said that the hair could be blocking the skin so the collar doesn't give the slight shock. So I trimmed the hair on her neck and problem solved. No she does not have a patch of missing hair, lol you really can't tell I even trimmed it.

Thank you PetSafe for this great product!