To some extent, this product could work as it is supposed to relax the puborectalis muscle and therefore straighten the anal canal to enable one to poop. However, for that to occur, the squatting position is with the upper legs 45 degrees to the body and a 45 degree angle at the knees. Therefore, this step is not high enough to create both those angles. For the step to be high enough, it really needs to be closer to the height of the toilet.
For those who use a diaper, yes it might make it easier to poop if squatting, but chosing that action is either a deliberate or automatic action. i.e. if it is a deliberate action, one is chosing when to poop, which is normally contrary to the wish to become diaper dependant for pooping. If it is an automatic action, one is performing that to make the pooping that is occuring easier, which also confirms that one is already diaper dependent.
On the other hand, if ones poop is soft enough, one does not need to squat for the poop to exit.