Bigface – I find GPS of greater use for post-ride analysis and for logging where you’ve been. Much like Stu, I take one mainly for those where-the-heck-am-I moments when the trail isn’t on the map or I’ve wondered off line on some minor sheep path in thick fog (neither of which are especially scarce in Wales). For the WRT last year, I used route cards printed off a desktop mapping program (tracklogs, memory map etc) and then laminated and clipped onto a map board, like this:
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P1020638[/url] by ianbarrington[/url], on Flickr
The GPS was useful afterwards to tell me how long I’d spent riding, distance, speed, amount of climbing etc.
If buying a GPS, beware the training models, such as the Garmin Edge, which don’t make it easy for you to navigate or extract your current location easily.