Mai's room is certainly bijou, in the best way, with the furnishing themed to match her kimono shop. It was comfortable for our two-night stay in Shimokitazawa, a lively neighbourhood away from the high-rise of central and other parts of Tokyo, interesting little streets of shops and cafes to wander through, with plenty of places to eat and drink. There are great rail connections through to Shinjuku and Shibuya (and Mai's accommodation is around three minutes' walk to the station). We were there for a Rugby World Cup game at Tokyo Stadium and it was quick and east to get there by train.
Mai was very helpful with directions before we arrived and a welcoming host. I enjoyed spending a little time in her beautiful kimono shop and learning about this beautiful clothing and its history and traditions. Unfortunately our times didn't work out to have a welcome beer with her.
We had our own toilet and shared a shower room but that wasn't a problem for us in any way. The room has a double bed and also a small table and sofa, so decent space for Tokyo. We didn't have a lot of luggage, if you do you might be stepping over it.There were no cooking facilities - not a problem in this neighbourhood - but a sink and kitchenette space with dishes etc for drinks and take-away meals. The windows don't look out onto anything and are covered with blinds, so the room could be a little dark.
Overall it was just right for our short stay in an area that's funky, and very convenient.