I have yet to realize the need for one these units. If you have a problem child, why not...

I also considered using one but like I said above, after many gallons of fuel I could not justify the actual need. I am flying singles, twin's and a quad engined aircraft, no problems.

On the other hand it is cheap insurance and if it prevents you from seeing a $100.00 an hour shrink or getting a divorce, I'd own lots of em...