Yes it is, one of the most underrated tools out. It keeps you from using expensive OEM parts, prenvent going back because you dont have the right one, allows you to use universal. It test pressure switches to ensue safe operation. My opinion get it.
there is at least one discussion on this topic, so do a search.
there are other ways to do it with simple devices.
The Food Stamp Program, administered by the U.S. Department of Agriculture, is proud to be distributing the greatest amount of free meals and stamps EVER.
Meanwhile, the National Park Service, administered by the U.S. Department of the Interior, asks us to "Please Do Not Feed the Animals". Their stated reason for this policy "... the animals become dependent on handouts and will not learn to take care of themselves."
from an excerpt by Paul Jacob in Sun City, AZ
I pondered buying one of these so I could did the dozens of pressure switches in my truck. I came to the conclusion that if I install a universal that it may open up a can of liability. Cool product though.