Thanks for your help, guys! Our Maremma is not a nuisance for the neighbours anymore. We are happy to see that he still barks, just not as much and in some sort of lower voice. I was quite reluctant to try this device as I believed we can rely solely on training and keeping him active to reduce his barking. It didn't happen... I have tried the collar on my hand and I was extremely happy to notice not a pain, but a surprising sensation. I was relieved to put it on our dog knowing it will not be a punishment, but a last resort training tool. I also found the booklets very useful and there was no need for us to call for help. One thing I have noticed in a couple of days was that he was not enjoying his dry food anymore. I thought the vibration from crushing the food might activate the collar, so we took it off and fed him from hand a couple of times. He got back to his old appetite so since then we took the collar off before every meal. Thanks again! We'll keep it just in case, although now after two weeks our dog is not wearing it anymore.