When i was doing non stoppers of above 45 miles, I considered the HW path. However I doubted that it would hold the interest for me. It is another route of several variables. Some stop at Carlisle instead of going on to the official end, some use the old military road that runs parralell with less ups and downs and some even short cut section taking advantage of the HW bus.
If it was a full 'wall path' done in just over 23 hours then that's a really good effort.
If I was to have ago now I'd probably do it as an ultra marathon and run the easy parts.