Date of your route : May 24, 2020
Reliability of the description : ★★★★☆ Good
Ease of following the route : ★★★★☆ Good
Route interest : ★★★★★ Very good
Very busy route : No
Wild indeed, we didn't meet anyone, neither dressed nor "naked" 
Best done at this time of year for the pleasant temperature and flowers (see attached photo), later it must be a bit dry.
There is a slightly tricky 100-metre stretch (not Pertuset, I think), through vegetation and sharp limestone pavements, with no cairns to confirm you are on the right path: watch where you are going and watch your step so you don't lose the trail or step into a deep crevice. The GPS track is not very useful in this area, as there are not enough points and if you stray 5 metres, you are no longer on the right path... Overall, however, there are no problems if you pay attention.
I recommend the wind map (Météociel, AROME model): on this day of strong mistral winds, it surprisingly predicted a calm area at this location, and that was indeed the case, with just a welcome light breeze!
PS for the Marcheurs Nus du Val de Roanne: I hope you've got some tough skin, as at the start of the season you'll need to do a bit of brush clearing to avoid scratches on your tender skin (dry, hard boxwood twigs!).
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