I used it, and might go back, IMO, mizani butter blend completely straighten my hair....when my stylist did my relaxer she got my hair bone straight, which wasn't that bad, but I prefer the thickness, I don't like to relaxer hop, MBB didn't burn like SE lye did, but I don't know, I have to find something to protect my scalp from burning, but overall I like MBB, and would go back....or find something not so strong by Mizani, HTH!