I have it in my a/c (Spruce's version of this. With a funnel, which is
easy to apply for men and women)
http://www.aircraftspruce.com/catalo...portables3.php

I did not use it in flight, fortunately. I heard my friend use if
successfully before. However, if you are the PIC and there is no FO
fly for you, you better have your auto-pilot turned on before you take
your leak.

It is very easy use by men because you can just unzipped it and do it.
However, it is completely with no privacy if you have other pessangers
travel with you.
If used by women or kids, I would probably put a towel on the seat
before it become too massy.