Way back when, I reviewed Canyon de Chelly - or rather, I compared batches. It was so long ago - it was actually numbered 022 instead of 722.
If you check out Creation is Messy's site, there has been much, much written about Canyon de Chelly and it's strikeability and reactivity.
To which, I would like to add this:
Truly a very worthy addition to the #deadleaf project.