We used Sam Ivy training back in February and got paired up with Jackie. Our 3- year old pittie girl, Fancy, had developed some leash aggression issues and Jackie helped us to fix those in only 3 weeks! At first, I was adverse to the e-collar and negative reinforcement but now seeing how well it worked and how NOT affected my girl is, I'm an advocate. I was concerned about whether it would affect her personality or her attitude but the only change is that she is now a well-mannered pup who still loves her family immensely. It's been a few months since the training ended and we were very pleased with it then but I was triggered to write this review now due to recent circumstances. I just got my first foster dog, Diesel, who had issues of his own. He was resource guarding, food in particular, but then he started guarding me from Fancy. These were not the same issues Fancy had but I was able to pull from the tools Jackie taught me and the background she gave me through Fancy's training to help Diesel. At first I thought I was going to have to give Diesel back but we pushed through it and now he is a beautifully behaved pup! Not to mention, I never would have been able to foster before the Sam Ivy training and now Fancy is a great foster sister. HIGHLY recommend Sam Ivy training - it has continued to pay off for us time and time again!