None of the multiple things wrong with my swings cause a Medicus to hinge (ever) so it did me no good at all. It did seem to help my son some because it was hinging all over the place when he first tried it. From what I see some swing flaws cause it to hinge and other swing flaws don't. I wouldn't say it's a gimmick but it may or may not help you any.
7/22/14 at 3:58pm