The Worst Treatment I've Ever Had Experience With. Breakage, Split Ends.
STAY AWAY from this stuff! One 'n Only fried my hair beyond all recognition. Mine is naturally pretty strong black Asian hair, colored lighter with a professional one-step process color designed for dark hair. I have experience, post-coloring, with a professional Brazilian Blowout done at a salon; the Rio de Keratin at-home treatment kit (used multiple times with superb results); and a professional keratin treatment, also done at the salon. Suffice to say I'm experienced with BB/keratin treatments. Since One 'n Only was cheaper than the Rio de K, I decided to check it out. What a costly mistake! I wish I'd never heard of One 'n Only because it RUINED my hair which I have been growing out for months. Not only did it fail to make my hair smooth, it did the opposite - made it coarse and brittle, with lots of breakage and split ends. Now, I understand that coloring your hair damages it a bit, but I have been coloring my hair for years using the same professional products (from a local beauty supply store), and I didn't have any of these problems until directly after using OnO. I could tell immediately during the process when my hair started to smell like one of those bad chemical perms from the 80s (the stench of chemically burning hair) that my mane was ruined. I couldn't even run my fingers through my hair, it was that bad, not to mention THE SMELL! This all happened following the directions to a T. If I had to do it over again, I would definitely stay away from OnO, and spend the few extra dollars for Rio de Keratin again (which smells like coconut), or go to a salon. Please learn from my mistake, and don't ruin your gorgeous hair! Full disclosure: I have no affiliation with Rio de K (in case you were wondering) or any salons.