Painful for tender headed-curly hair types [SEP] My daughter has thick 3C type hair. This was a painful experience for her. I watched several Youtube videos and it didn't seem like it pulled the hair much during install. But nearly every other section pulled her hair. The hooks kept getting stuck and wrapping around her hair during the install. I would not recommend these if you are tender headed. It did not rip her hair out, but she is tender headed and since her hair is thick I had to put some elbow grease into getting the hair through the wave former and she cried. She also said it's uncomfortable to sleep on, about the same as the typical curling rods. I gave it 3.5 stars because it definitely does what it says. It's not the same as braiding your 3C type hair and leaving it for a few days, despite what some reviews say. I would have to leave braids in for a week for this same over-night effect. I also had to buy two more packs because it wasn't enough for half her hair.