We have a 3-year-old lab/collie mix that usually is well behaved---but off leash times he gets distracted by scents and takes off or will not consistently come when called. We love going on longer hikes and not having him leashed the whole time. We are reluctant to use the shock and have focused more on the beep and vibration as so far 100% of the time, it redirects him back to us and the command he was given--and there is never an issue. We have only used it three times so far, but are happy with and the ease to set up everything. The only somewhat negative point, or more so an issue to be aware of, is that in the winter here (in Canada), you need to remove your gloves to use the remote as the buttons are relatively small.