I tested this on my mom's hair (fine, soft, short and very curly).
Results: hair shiny, easy to comb and blow dry only 5 minutes max.
I also tested it on the hair of my sister (very long, thin, wavy, often nodes). Results: hair shiny, easy to comb and blow dry only 15 minutes max.
I still have enough product in the box to the smoothing of a person with short hair (max shoulder).
Conclusion: VERY GOOD PRODUCT.
