Wow that collar sounds great. Please let me know where you got it. Our problem is that our boy Champ tries to dominate our girl and though we have been able to work with hom some, he still tries and if someone else is around they get bit too. For exaple this weekend my sister came over and Champ has this thing of biting Belle when ppl come like if he dosne't want her to get attention but my sister's hand got caught in the middle and unfortunantly got bit. So though it's not direct aggression towards us I think this collar would work great.
I got it from the trainer, Sherry Moore from Ohio…Her and her husband buy normal shock collars and transform them into a virbrating collar. Im sure if you googled it youd find vibrating training dog collars. (Mine was free bc she is a friend of the family and they make them themselves) but I know she doesnt sell them unless your being trained under her. Ill do some research and see if i cant find some online tho!!