I agree with another reviewer that this collar probably isn't the best for TEACHING a behavior, but for fine-tuning response to off-lead commands that the dog already understands or for correcting behaviors that happen when the dog is diffcult to reach (like darting out the front door, etc.), there is nothing better than this PetSafe remote spray trainer. And believe me, I know! I'd tried everything I could think of to teach my dog a good, solid recall and he was good as long as there was nothing else more interesting going on, but God forbid if he saw a cat running across the yard, or another dog approaching us at the park. And I can't count the times I ended up having to crash through the bushes after him because of a squirrel who unwisely chose to depart from his tree and cross our path as we walked along.
I mean, seriously, I'd tried a lot of things to improve his recall around the distractions; calling his name and running the opposite direction while waving my arms around and making crazy noises so he'd find me more interesting, using a whistle and teaching him to associate it w/ good things like treats, keeping him on a 30 foot training lead so I could step on it if he made a break for it (incidentally, this was the worst of the ideas. Almost broke an ankle when the lead wound around my leg and he took off!) and even an electric shock collar, which did serve to get his attention off of whatever he was running after, but even on the lowest setting he'd yelp and look around and seemed so distressed that it was still hard to get his attention back on me, not to mention how bad it made me feel to see that "What the heck was THAT??" look on his face.
He was kind of like that nursery rhyme about the little girl who had a little curl right in the middle of her forhead, you know? When I could get his attention, his recall was fantastic, but when he was too distracted, he was horrid! So it occured to me that since his nose seemed to be the driving force behind his distractability, maybe I needed something to interrupt it and I came across the PetSafe spray trainer. It was enough to distract him, but wasn't so much of a distraction that it freaked him out and made him shut down.
I didn't see any point in using both the "negative" and "positive" buttons, so I just used an enthusiastic voice for positive and the button for negative. We spent a couple of days working on it during our high-distraction situations on our walks w/ him on a super-long Flexi leash. I'd wait until he was distracted and call him. If he came, he gots lots of praise and a high-value treat. If he didn't immediately turn towards me, I'd use the tone followed by a spray. It only took a couple of times of the tone/spray combo before he figured out that if he turned and started coming towards me, the tone and the following spray didn't happen. After a couple of days of on-leash practice, we tried it off-leash. He was fabulous the whole time w/ the exception of one time, when one of the other dogs started chasing a jogger and my dog went to join in. I gave him a stern "AAh AAAHH" and sprayed and he turned and came running back. Now all I have to do is give him a verbal correction and he'll leave whatever I want him to leave w/ no problems. We'll phase it out eventually, after his coming when called the first time becomes an ingrained behavior for him.
All in all, this PetSafe trainer has been an absolute God-send for me and for my dog, as well. I can go to the off-leash dog park to walk w/ friends and their dogs and not have to worry about what'll happen if a dog we don't know comes running around the corner or worry that he'll run off playing w/ another dog in our usual group of boneheads and get distracted and take off after something. If I see someone jogging or an unfamiliar dog/human combo up ahead, all I have to do is call his name and he'll turn right around and come back to me to see what I want. He used to be a devil to get out of the water, now if he ignores me calling him, it only takes hearing the collar beep for him to come back. We've even ordered a second one, in case we ever need to send this one off for repair (Lifetime Guarantee, too!) Best money I ever spent!