this is our second time staying in one of Masa's units. i would still recommend staying here. the unit was perfect for my partner and myself. if you are tall (over 5' 10") the bed may be small (neither myself nor my partner are over 5'10"). it's within walking distance to the JR Shibuya station and the metro. there are an abundance of things to do within a few blocks. for being in the heart of Shibuya, the unit was fairly quiet (I didn't notice street or neighbor noise, though I live in a city normally so my threshold may be different than yours.
masa is a great host and readily available if you have questions or concerns (we didn't). we will stay here next time we are in Shibuya.