Tony taught me how to use the e collar on my young Vizsla. I had a very positive experience with Tony and my dog. My dog is now 3 years old and very well behaved. I always feel I have control of my dog and most of her exercise is off leash. People often comment about how well behaved my dog is. I hardly ever have to use the collar except for an occasional tone which reminds her she isn't listening to my commands. Now if I can get my husband to behave as well !!!