GPS, especially handheld ones with terrain, roads, rivers and such, ADD
to my enjoyment of the flight. It also gives me and my passengers
something to do on a long flight.

Knowing EXACTLY where I am at all times and being able to direct to
pretty much everywhere (just the prohibited and restricted airspaces,
oh and TFR's to go around), save time, money and fuel.

GPS is a terrific invention.

I've started using one in my car. Nice to punch in "nearest Mexican
Resturants" and get a list.