Can an e-collar be a positive tool‪?‬ Conversations with Dog

There are lots of points of view about e-collars, or shock collars as they are commonly called. But how does your dog perceive them? Are they cruel tools? Can they be used in a positive way?
What do these collars acomplish? Let us see if we can bust some myths and shed some light on the usage of these tools that seem to divide people into two camps!