just ok [SEP] i try to get keratin treatments every months but honestly it has been getting costly so when i saw this i was excited to try it i found it difficult to use and almost impossible to get to saturate the back of my hair and straight iron it the way they do in the salon front and sides were ok but i could not maneuver the back to get it straight then i saw the ingredients after the first time and saw it contained formaldehyde and that was the last time i used the actual treatment i did however use the shampoo and conditioner and i still am i wish they sold the s c separate because i really did like it and i am always in the market for a good hair wash which will not strip my hair between treatments i will resume my regular treatments at my salon