Route description was pretty good, in fact I wouldn't have had a hope in hell on a 1:50,000 in that terrain. Plus the rain + gales + excessive mud.
Only a couple of minor errors after dark with 'interpretation' of description. Interestingly, I think I spotted where the person writing the description changed (I may be wrong, perhaps it was one guy only for the whole route - but I doubt it). The first half had more relevant detail to it, things that one spotted and mattered, whereas the second half was slightly less detailed, which meant looking about a bit at some junctions etc.
And yes, the Missus got round her first 50, and tough it was too, never seen mud like it for final 20 miles