I’m probably not a good one to comment on these, although I can agree with this assessment from this piece in the Times of India (although it may have originated at the Huffington Post India): “Ashtanga is not a practice for the faint-hearted.”
It goes on to list not quite a handful of reasons “to love this practice.” Here they are; click this link for the full explanation of them:
Dedication. Strength. Letting Go. Mirror Effect.
Kudos to the piece for getting this part right: “consisting of six series, and each series contains its own sequence of asanas.” You may recall that can be easy to mess up.
Posted by Steve