I've got some findings to share.
On Wednesday night I washed my hair using the simple method referred to here. This pic was taken this afternoon.
The comments on the recipe post report varying results but so far so good for me.
I've been using a Natural Shampoo for the last couple of years (twice weekly) & I would say that the baking soda/apple cider vinegar compares well, if not more favourably.
Points to note:
1. My hair is super thick
2. I ran in the rain yesterday morning
3. I ran a LONG way this morning
Considering the fairly serious conditions I'm pretty impressed.