I purchased the Suave professionals keratin infusion 30 day smoothing kit last year. I took a Suave quiz on their website beforehand and it recommended this kit to me. I have read reviews of people having very adverse affects to this smoothing kit so I would definitely make sure you have the correct hair type before you embark on trying out this product. I have very thick and frizzy Hispanic hair so it was meant more for this hair type. My hair was not color treated at the time of use. This product was not easy to use at all. It's a 48 hour process of not being able to wash your hair so make sure you have a lengthy amount of time set apart to stay home because the scent of this product is not very pleasant. I was hoping not to have to flat iron my hair every single time I want to wear it down but this product did not work at all on my hair. It didn't make my hair any more straight or smooth. It actually dried it out quite a bit but nothing that a deep conditioning treatment couldn't fix. Overall I was very disappointed with this product. It was very time consuming especially for absolutely no results.