Clean and a very convenient location. Close to several convenience stores and supermarkets, and a short walk to Akihabara. The room itself is a comfortable size and well insulated. All the appliances work perfectly and are very clean.
The bathroom is also very clean.
Response time is quick, and you should be fine whether you can speak Japanese or not.
The entrance is narrow and there's a tight staircase, no elevator.
It's possible to cook, but if you are coming with two people, there won't be enough plates and there is no cutlery, so be prepared.