Changed my life.Buying this was a 4 step processFor me.1. Finally deciding to buy it. Research. Ordering . And receiving/ reading manual. Definitely read the Manuel before you do anything. It’s a little complicated. Watch YouTube videos on set up.2. Map out the circuit starting with where it plugs in. Mine is plug inside the house which requires a hole through the house and siding. I used an old telephone line hole so I didn’t need to drill. Lucky you if you are starting from the garage.3. Lay in the wire. I needed a straight cutting yard tool to cut through the lawn, I hoses out the cracked in the sidewalk and used a sidewalk/cement caulk to fill and protect the wire.Get the whole circuit back to plug area. Turn on, test.4. Train you dog. Which takes a week or more.Okay, if I read all this I would not have been as enthusiastic to buy. But I really am glad I did. It works great. My dog responded very well. My family is no longer stressed that the dog will run out every time the door opens.Quality product.