Squatting is the ultimate position because it’s how nature designed us to completely release. But, the reality is that the western pedestal toilet is not going to disappear overnight and those in cultures and countries that have them are not going to take to squatting en masse.
The PROPPR gets you comfortably close to the perfect squatting/releasing alignment (releasing the kink in your gut and allowing the colon to straighten) and is suitable for most levels of flexibility. The key is to have your knees higher than your hips. A foot rest for toilets, like the PROPPR, helps you squat and sit at the same time!