This place is a gem; it has great train and walking access to Shinjuku Station.
I loved the comfort of having a private bath, and the convenience of a shared kitchen (it was easy to buy some cheap ingredients and make lunch for work). A heads up for people with long hair, the shampoo/conditioner is a 2-in-1 type so you might prefer bringing your own.
But you can’t beat the value and price; I will definitely stay here again!