he px (at any DIN range) might be better for racers, but it is a shitty binding for freestyle.
The px has all kinds of pre-release issues when taking off and landing with rotation (spinning). It also seems to have less elasticity in the forward pressure, so people are pulling off their skis in grabs when the ski is still rebounding/bouncing from the take-off flex.
The pivot is not perfect (the turntable plate can sometimes ride on top of the forward pressure tab), but it is WAY better than the px, at any DIN range.