As previously reported, we have had an Invisible Fence installed to contain our new puppy. The puppy (whose name is Pavlov) is a bluetick coonhound; a notoriously un containable breed. Yet, after only one week of training (out of the required four-week regiment), the little guy won't go anywhere near the borders of our yard. Throw a Frisbee into the road, and he sits a respectful 10 feet away staring forlornly but remaining motionless.
It's unbelievable. I'll keep posting updates, but based on what I've seen so far, I would recommend this product to anyone.