The treatment has worked wonders on my long, coarse, frizzy, curly hair. I’ve just returned from a fortnight in very hot Europe & it was almost frizz-free for the duration. When I wash it (using sulfate-free & salt-free shampoo) it is quicker to blow dry.
It took a long time to apply & despite the assurance that it’s formaldehyde-free, I found the smell overcoming a few times & even though I was given a mask to wear, I had to go outside to get some fresh air as my throat & nose were burning.