I tried this on my smaller dog that barks to try and train him but it is so big that it makes it hard for him to lay down in certain positions. Also when it was so big I had to cut some of the length of the collar cause with his neck so small the collar end was flaping around, so that frayed and was unravelling. It also didnt work for my small dog, he was able to bark without it beeping and vibrating. I made sure it was not too tight biut also not too loose so not sure why it wasnt working,
I think it is a great concept and maybe it will work better on bigger dogs, but it just didnt work for my little guy sadly. At $40 if it worked I think it could be pretty wrth it since it is not a shock collar, which I dont think should be used for dogs, but thats my personal opinion.
I am still glad to have tested this collar out, and hope it will work on bigger dogs, or maybe I was just doing something wrong.