Why I don't trust GPS
I have never had a complete engine failure yet am always in practice and on the look out for one.
Luckily however, Dubalya does not have his hand on my aircraft ignition switch unlike the GPS system.
However not trusting a system is not the same as not using it.
I use GPS on a daily basis. However I will not use it without suitable back-up and cross check available from visual navigation or radio aids and I will never use it to make approaches.
DFC