Wasn't sure about a inflatable cushion at first, but once it's pumped up to full size it holds firm and doesn't wobble at all. The angle works surprisingly well for solo sessions, and deflating it afterward takes seconds.
John★★★★★
Took a bit of pumping to get it fully inflated, but once it was firm the cushion held its shape the whole time. Way sturdier than I expected for something inflatable.
William L.★★★★★
Didn't expect the inflation to make such a difference, but once it's pumped up to the right size it holds firm and stays put instead of sliding around. The cushion shape supports your hips at an angle that actually works.