I have used his system on 3 dogs. It works well.
He said I could have my dog leashed trained in 5 minutes. . . He was wrong, it took 3.
Those who are complaining are complaining about orders and such, the product works well. Just be patient in the ordering process and don't buy the extras.
I have used it to break bad habits of my dogs digging. I have used it to train them to not lick.
I have used it to train them not to table surf. I have used it to train them not to jump on people.
It is a great system. Sure beats the option of paying a professional trainer.
Product or Service Mentioned: Don Sullivan Dog Training.
Reason of review: Good quality.