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
Hairtype 2c

Low poo: Petal Fresh Organics Rosemary & Mint Volumizing Shampoo
Protein: Colorful Neutral Protein Filler
Detangler/RO: KCKT (winter) or Curl Junkie Beauticurls Argan & Olive Oil (summer)
Styling: KCCC

Beauty Is Not a Number