Thanks for the answers so far! Sounds very promising :-) Curious to hear more.
Claudine, why was it a waste of money for you? With regards to porosity: I discovered my hair has low porosity because it doesn't absorb anything. For example, when I spray water on my hair to re-wet it, I see all these beads of water just sit on it. The same goes for many other things (oils in particular). It just sits on my hair. I did the slide test as well but found it very difficult to determine my hair's porosity that way.
F - LP - HD - NE
Fine, low porosity, high density, normal elasticity
Natural & CG since 2010
Low poo: De Tuinen Mexican Cactus Shampoo
Rinse-out: Aubrey Organics GPB
Beauty Is Not a Number