The salon that I used to go used Ashtae' products. I have a sensitve scalp and the relaxer was much to harsh for my scalp. I was left with chemical burns everytime, no matter what I did.
My stylist currently uses ashtae relaxer on my hair...and I love it...In the past...I've used optimum and I had gotten bad results from it (major burns)...she then switched me to ashtae and I've been hooked ever since...it's a very good product.