Reviewed by Cherry-Anne Osborne - 20th May, 2020 Disappointed. It doesn't work as described The universal clamp can't grip the seat structure and support the weight of the umbrella. The ratchet system for adjusting the position of the umbrella isn't sufficient to hold the umbrella in any position, it just flops down. It is intergral to the clamp mechanism and so twists out of alignment. It looked promising but fails on all levels.