Well, I'm also one of the people who have managed without a GPS quite nicely -they really aren't essential. But I can't say I've managed without a GPS quite happily -there have been times where I've been lost and spent some frustrating amount of time trying to find my way with bad maps and even worse road signage.

But hang on.... I know some people will say that half the fun of touring is getting lost? The problem here is that I think that only really holds true if you are on a longer tour and/or have the time to do a bit of impromptu exploring (even then, I think if it was getting late at night, I would want to find that campsite or forest!). If I didn't have any time limits -ever -I don't think I'd consider a GPS -but unfortunately I do.

I would like one eventually as I do see the use in them. But again, I've managed to tour successfully without one (e.g. not having a GPS has never stopped me!). Another aspect that appeals to me is that a GPS sounds like it would enable you to concentrate more on cycling. Though I'm a bit of a map nerd, there are times when enough is enough and you just want to keep your head up, enjoy the scenery and pedal.