The room is exactly what its owner describes in the portal, point by point, so don't expect any bad surprise. It is located close to Iidabashi station, so, all the main spots in Tokyo can be reached easily.
Talking about the apartment itself, is one room, with a queen size bed, pretty comfortable and suitable for two persons. It has also a table with two chairs, very useful for work or when eating at home. The closet is big enough to have all your things stored there without any problem, including the suitcases.
The kitchen area is small, but has all the needed amenities, like fridge, microwaves oven, kettle and so on. Pretty complete and useful.
The toilet/bathroom area is a little bit bigger than the classical one for small apartments in Japan, so quite comfortable to be used.
Additionally the rooms has a washing machine that works perfectly in the balcony, AC system that works well and a wonderful internet connection. There is also a decent TV, but never used it, so cannot give much feedback.
If I need to find any downside, it would be that the building hasn't elevator, and the room is in 3rd floor. Only an issue for the day when you arrive with the luggage, but not much else to say.
The contact with the owner, Kimie, was super easy all the time and she provided all the needed details, clearly explained, perfectly in advance. Impossible to do better regarding this.
Overall, the apartment is perfect for a short or long stay. In my case it was 6 weeks and I was not missing anything.