Works quite well!
The first time I attached it my shower wall (dry, non porous ceramic tile) it stayed for a few hours and eventually fell off. So I read over the instructions again and basically screwed down the the suction as hard as could and as far as it would go, left it alone for 24 hours and when I thought it was safely in place, I hung the shower caddy on it (our shower head is too high to hang showers caddies on). And 3 days later it is still hanging tight! I hope it continues to work. I will update my review if something changes.
Rating: 5 stars