I'm at my wits end, otherwise I wouldn't resort to using one of these. But, I just bought one on eBay (saved about $50 over buying the same exact one in a store). Our female Yellow Lab will not fucking stop barking at our neighbors. She knows she's not supposed to, because the moment I yell at her for it, the head and tail go down. At this point, I don't even have to say anything. Just seeing me after she does it makes the head and tail go down. I started out just yelling. When that didn't work, it became a yell and a smack. The next step is a 2x4 upside the head, so that's why I bought the collar. I gotta nip this in the bud before I end up on the wrong end of a noise complaint. It's a pain in the ass because it never fails. I always check to make sure the neighbors aren't out in their yard before I put the dogs out, so I don't have to deal with it. But, almost every fucking time I put them out, someone either comes home or goes out, or goes into the back yard. Unfortunately, from our backyard our dog can see/hear all the comings and goings over there. No matter what time of day it is, she barks. It's been like this from day one. When she was a pup it wasn't that big of a deal, she wasn't that loud. The bark of a fully-grown 110-pound dog is a different story. It's only going to get worse, because the neighbors recently installed a hot tub on their back patio - so they are gonna be out there alot more for that reason, in addition to the nicer weather that is on the way. Of course, the worst is when I let the dogs out for the final time of the night before I go to bed- which is anywhere between 11PM and 2AM. That's my biggest concern, that someone's gonna call the police because this dog is barking at 1AM. My neighbors have been cool about it, but I know they are getting sick of it because the last few times they started yelling when she started the barking routine. I understand these things are quite effective and I expect her to learn real quick. The collar has 8 levels of shock correction. Most people report they only have to use the first couple levels, and after a couple months they don't even need to use the collar anymore because the behavior has been corrected. Anyone else used one? I can't be here 24/7, and I can't be out there in the yard with them every time. Something has to be done. My other dog doesn't bark at all at these neighbors. He only barks at stuff he hears but can't see. If he can see something, he generally doesn't bark at it unless it's a cat or other small animal that he thinks is a meal.