Great product, would recommend to anyone. Took about 3 hours total for me because my backyard has some trees I had to go around but mainly just zip tied it to my existing chain-link fence, staple gun for the wooden fence/side of the house, and burried around the AC unit so they wouldn’t tear anything up around there. My 2 lab mix puppies had learned to climb the chain-link and were getting into my neighbor’s yard and to the front yard (luckily always stayed close by) so I was fearing they would get hit by a car and didn’t want them in my neighbors’ yards. We tried them inside but due to them being puppies they just wanted to tear up stuff (which they did) so I put them on leads but then they couldn’t run around as much and kept getting tangled in the trees. I was about to spend about the same amount of money on 2 large kennels so I figured I’d try this out and I’m glad I did. Saved a bunch of money over the competitors and even got the extra collar all for about $200 and the install was very easy, just time consuming. I do recommend using a drill to twist the wires, so much easier. Didn’t need to really train them like the manual said, just took a couple shocks and they learned the boundaries. They hated it the first couple days cause they didn’t understand why they were being shocked but after a couple days they started going back to their normal selves, running around and playing together and now know their limits. I don’t agree with the level system for our dogs. I consider them “very hyper” but 4 and 5 was way too high for them but 3 seemed to work just fine. As for the boundary limit, I just had to kind of mess around with it and 6 seems to be a good boundary for our needs. All in all, extremely happy so far (couple weeks in).