I have wavy hair with medium length, dyed, but without any special treatments.
Disadvantages: First of all, the scent is non-existent, which for me is important for a leave-in product to leave a nice smell in the hair. Then, at least for my hair, it did not provide any particular reconstruction, nor any special texture. I would say it probably made my hair dull.
Advantages: It made my hair very manageable, allowing me to straighten it easily and quickly.
However, I will not choose it again, because I have purchased another product in the past at 1/3 of the price with a much better result.

In thin, damaged, brittle hair that frizzes immediately, it facilitates styling and moisturizes satisfactorily. Personally, I'm not thrilled with its scent (it smells like a chemical salon product) and I use it together with another leave-in conditioner for additional hydration. It doesn't weigh down the hair at all (if you apply it to wet, shampooed hair) and I even use a considerable amount (about 6 sprays of this and 8 of the other). After 2 months, my hair has finally grown longer and looks much more moisturized and healthy.

Light texture and neutral scent moisturize and smooth the hair. The hair is shiny without frizz. Depending on the quality of the hair, you adjust the amount of cream.

Very nice feeling on the hair. I feel them softer and I think it helps with frizz. The scent is relatively neutral.