The Collar is just a tool. not for punishment.
Correct use of this tool gives you a cordless check cord that can be used at any distance.
In starting yard work the first thing i do is work on comming to you
I use (Here) as the command
with a long check cord and leather pinch collar around the dogs neck.
I let the dog run around and pull the cord to me calling here the whole time. after a few repitions of this saying, here and pulling 1 time the dog comes to you i do this for a few days.
Then i put on the collar at very low volatage give the dog a constant stimulation pull the check cord and say "Here" when the dog starts to move to you let off of the collar. (Positive Reinforcement)
Using the collar in this method it does not effect the dog what so ever.
In fact the e-collar is only replacing the pinch collar. the dog should not even notice the difference between the two.