Made a difference
I have the worst hair; fine, frizzy, somewhat wavy, single color processed hair. I am a fan of Pravana and saw that this process cost anywhere from $45-$85 at nearby salons. The Amazon price was a good value and I was able to easily apply it alone.  It worked pretty well to add some controlled body and reduce frizz, it lasted about 2 shampoos for me, but there was enough product to do about 3 applications for my a bit longer than shoulder length hair. I was pretty happy with the results, I did not expect a keratin straightening results, so overall I was glad I purchased.
Rating: 4 stars