The club I rent from!
Well Gurtrude we now see the heart of the problem , No training and little use of the equipment.
When I first fitted the IFR GPS I built a rig to run the unit at home and then took the time to find out how the thing works. Now you can get computor programs to teach you how the unit works.
GPS provides IFR navigation that thirty years ago was only avalble from airliner size INS units costing the other side of $90,000, professional crews would be trained to use these things on a type rating. With kit like this now avalable to GA you would expect to have to do a little trainning to use such a tool.
It would seem to me that Gurtrude should spend a few hours finding out how to use the kit (on a computor trainer provided in the flying club that rents him the aircraft ?) rather than complaning on about how poor it is. I thing we are now back to the "poor workman" bit!