This is our second Happy Hairbrush, my daughter has very long hair and has some sensory issues, she just loves these hairbrushes. They are the absolute best and worth every penny.
Initially it did not deal with my daughters knots which were gathered underneath her very thick and mostly straight hair. She was quite upset as we had imagined it would solve her painful airbrushing issues. I then decided to wash and heavily condition her hair and worked out the knots with a lot of meticulous care.
Since then, we have maintained her hair with this brush. It has kept her hair healthy and silky with less breakage.
Not quite the miracle we d hoped for but close enough!