Suction doesn't work well
I wound up just taping it up where I wanted it, because I needed it! The holder itself is slightly tapered and holds my Waterpick handle just fine, but even without the shower head on it, it falls of in middle of night. I just used some 3M foam tape that is water resistant to attach it - functions fine and less hassle than returning and trying to find something else!
Rating: 3 stars