This hair product is excellent for, I would say, 99.5% of all people who use it. It truly is truth in advertising!!......HOWEVER---- It's like "perm" (almost), meaning if you over-use it, use to much, or do not wash out frequently, (i.e. at least a shampoo every 2 days), IT WILL PUT A RASH ON THOSE OF US WITH SENSITIVE SKIN! I broke out with "inflamed", "reddened" (if that's a word), and "tender" skin after putting it in and going to bed. IT COULD JUST BE A SMALL PERCENTAGE OF PEOPLE LIKE ME, WHOSE SKIN IS OVERLY-SENSITIVE TO THE CHEMICALS WITHIN IT-----HOWEVER--- I still use the product, because it's a great product, and truly puts nice waves in my hair. I just have to shampoo every night before bed, because if it gets into my pillows and bed sheets, my skin pays for it, JUS' SAYN'!!