I have just returned home from three weeks flying in Europe and just can't resist commenting on some of the ideas posted here about GPS.
Aviation like all other human endeavours evolves with time by finding new and better means of accomplishing the task.
GPS is our newest and most accurate and reliable navigation aid.
To remain fixed in the belief that VOR and ADF are the nav aids of choice would indicate that you should disregard wheels and just drag your vehicle over the ground.
To keep reguritating the mantra that one should rely on your map is just to simplistic.
A truly professional pilot will use whatever aids he / she has at their disposal to the best advantage of the task at hand.
GPS is the best aid developed to this point in time.
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The hardest thing about flying is knowing when to say no.