My hair relaxes bone straight no matter how fast the relaxer is applied. Seriously. I'm too scared to do it myself and my mom does it for me. She went to hair school so she is pretty good at doing hair and she'll be going as fast as she can. I get it out as fast as possible....bone straight. It looks nice though. It's weird because my mom's hair doesn't take that fast, and neither does my sister's--my sister actually has to use super strength because her hair is so resistant. I always have to use the gentlest formulas because my scalp is so sensitive...still bone straight. Oh well. Anyway, that's why I'm afraid to do it myself. I know there's no way I could go as fast as she does and I'm afraid I would burn all my hair out.