People will cringe, but I Have 3 dogs & I don't like leashes! OMG! Especially in remote areas. Two of my dogs are rescued from the pound. One male was 3 yrs. when I got him, he's now 6 & listens fine 95% of the time, but he cannot always be trusted, such as if we come upon a car, or wild animals, or sometimes people. Also he was teaching my other 2 dogs his bad habits. I know he knows the "N" word NO & that he wants to be good, but sometimes he just can't help himself. Thats when SportDog comes in handy & snaps him back to being a good boy! And not in a cruel or bad way. I've trained him that theres an escalation, first he gets the voice command & a beeping, if he doesn't respond to that, then theres a vibrate "nick"(a quick vibe) & if still no response, he's really out there into his prey mode, he gets the steady vibration & then it goes up to the #1or lowest level of shocks. But anymore I rarely have to use anything at all, as I've noticed many other reviewers mention. And I never have to go above the #1 lowest setting (the thing goes up to 7 plus a whole other level of 7 more settings) he's a new guy! I used to be apprehensive about who or what we may encounter on our walks because at a point I honestly had NO control of him, if he wanted to take off & chase or intimidate I couldn't stop him & it could be embarrassing. I got plenty of lectures from frightened irate people & I couldn't blame them. I first got the collar & read the training manual & watched the DVD & thought this might not work for my purpose (he's not a hunting dog!) but I decided to try it anyway. I don't know the psychology behind it but I know he immediately responded & came right to my side. You would think he'd run the other way but he doesn't seem to associate me with whats happening on his neck. I'm not sure if it's fear but I'm positive it's not painful because I can use the #1 setting on my finger tips. Anyway I'm very happy, it rarely needs to be charged & the range seems to be very good, I don't know about the 500 yard mark as he never strays that far away. It's like I now have a remote controlled dog!