Going laterally helps the fingers and makes the angle of arm to finger to key actually good
Organisation of the hand is very capable. Practice overholding!
For a live, vibrant sound
Constantly evolving, empowering tonus of the hand
The gravity is educating and informing skeleton how it can org itself into vertically without any...
Of Foreign Lands and Peoples
The ear starts the appreciate the harmonic color which ultimately gives you better control
Not only that but the very solid foundation on what you should base your piano technique