Review title is Doesn't work for me [SEP] When I first got it and put batteries in the lock wouldn't stay in place so the back kept falling out. I returned it and had another one sent to me. I love the feel of the brush on my scalp, but my hair is no less frizzy. I hear the hum and know it's working ok, it just doesn't de-frizz my hair. And the massager part is too light to feel anything good. I won't return another one so I just have a $20 plain old brush now.