Su’s place represents excellent value for money and has all the essentials for a couple or solo guest who want a central base in Tokyo. It is, as others rightly point out, a tiny home. This is not a home for staying “at home” in - it’s a place to rest your head, have breakfast and get out and explore / work. The kitchen has the basic equipment if you wanted to cook something simple.
A note on the bed - it is in a loft, accessible only by a ladder. As originally set up, it is very firm. I like a firm mattress but this was too much for me. However we moved the mattress down to the tatami mat and added the extra futon and it was fine, still firm but comfortable enough for a week’s stay.
The apartment is a few minutes walk from various metro stations which give you easy access to the city. There are some nice restaurants and cafes in the area.
I honestly don’t think you could get better value in Tokyo than Su’s apartment. I would highly recommend.