This exercise is challenging. The angle it created with wrists requires a good warm up. The benefit of it is to improve this moment right before your weight is over your shoulders. Imagine your hands touching the floor and now the weight moving from your legs towards your hands. At one point, you need to compensate the weight of your legs holding your center and unrolling your pelvis up. That is the moment where this angle of the shoulder slightly in front of your hands is helpful. For people improving their press handstands, this exercise is nice. For the begginers, just making the planche and shifting your weight forward brings great progress.