If you have hair you need one of these! I cannot quite believe it but its true, it goes through the most knotty, damaged, fragile hair, with no tugging, pulling or breakage. I had got to the point of having to cut my knots out as it was just making the hair come out if i tried to brush or comb them out, and then i remembered seeing this on Dragon's Den and decided to get one and see if it lived up to the hype, and believe me, it does. I really am so pleased with it, as it's stressful to be cutting knots out, or having loads of hair in the brush and on the floor, i wish i had bought one ages ago.