My hair is straight, so straight that it's hard to perm. I color it, but I think it doesn't cause much pain. I often find that heavy treatments make my hair difficult to manage, so I use this and buy the large (expensive) size. My impressions after using it in combination with a heavy treatment: It really feels refreshing on the scalp. It feels good even in winter. My scalp feels light and my hair is smooth. Sometimes I feel like it's too light, so I use a heavier treatment just on the ends, but it feels so good on the scalp. I use it while keeping an eye on my hair. I love it, but it's hard to recommend.