I purchased a Groupon for the keratin treatment. I have had this treatment done several times at another salon, and I asked the salon before I even bought the Groupon if their treatment was the same. The salon answered that it would be the same. I got the treatment done, followed the instructions of not washing my hair for five days, not doing sport, etc, which I am familiar with. This treatment did not do anything to my hair at all! It was a complete waste of time and money. I am suspicious of what they really put on my hair. There's really no reason for it not to work if they put on the correct product. Very frustrated!