My co-worker has a deaf daughter who uses this service a lot. I have taken several calls from the operator and know that it can be a life saver, sometimes in the literal sense. And those operators have been very polite even when dealing with me.
As a side note, who here is old enough to remember CB radio (26-27 MHz version) in the 70's? Remember what happened to a very useful tool when kids and some not-so-young idiots thought it was cute to trash the airwaves with all sorts of illicit gear and operations? I suspect that anything useful will be trashed by those who have more wealth (in more than just money) than brains, and those who prefer to steal than to create.
I am not lost, I find myself every time.