The S2H2 has a long c-dimension and a really low vertical center of gravity. Those are two key elements of playability / forgiveness. Longer c-demension (distance from hosel centerline to horizontal cg location) makes the design really stable, especially on off center hits. Lower cg is easier to drive below the cg of the ball, providing more solid feel and better, more consistent trajectory. MPF is all about the mass and dimensional characteristics of the design. A high MPF doesn’t guarantee you or anyone else will like the club. It could be the fit, the look, something in your action … a number of things that might prevent you from hitting them well. One thing it is not is the instability or bad mass and weight distribution of the head design. In the S2H2’s case, those are very good and would not contribute to bad performance.