H
You've specified the good reason for using sat nav - driving abroad. In Britain I already know the way to pretty much any major town or city without the use of a map, and I also possess good quality large scale maps of the whole country. A sat nav, therefore, is superfluous for me, although I recognise its useful ability to take you directly to an actual address in a big town. Also, here at least I can rely on road signs being in English (or Welsh and English).
Once I'm over the water, I see far more use for a sat nav - in fact the only times I have ever actually driven with a sat nav have been on a business trip in the Netherlands, and on our trip to Schalke, and on both occasions I found them helpful. As you say, though, it's a tool - I'd no more drive into a canal because my sat nav said so then because my map said so, and the problem is that too many people just blindly do whatever Digital Doris tells them to do regardless of what they actually see when (if) they look through their windscreen. And although Doris is pretty reliable, sometimes she gets it wrong.
As for the average hotel receptionist, you've obviously fared better than I - I have yet to find one who could find their arse in the dark with both hands, let alone direct me somewhere competently. Mind you, as a bloke, I am genetically ill equipped to actually listen to directions - as soon as they start talking it just goes in one ear and out the other.