They're quite useful for road touring. They don't show much in the way of off road stuff, and the ability to consider hilliness is very limited.
But the advantage of only needing one of two maps was huge.
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For the Cornwall/Devon leg I did do some detailed strip maps, due to the very hilly nature of the area, and I was doing it in the dark. That was in case I needed to find an alternative to sections of the A30/A39.
Ironically, the only deviation I made was at 1am, turning off the A395 towards Launceston, I hit gravel on the road. Off the top of my head, I detoured by staying with the A395 and going
on the A30. Wasn't busy, though.
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