Miko is a great host. She is very responsive to our inquiries and we felt very welcomed. Her check-in instrustions were especially clear and helpful.
The apartment is in the Shinjuku Kobukicho neighborhood, which has a very active nightlife scene and great choices of restaurants within walking distance.
It's on the side of a major traffic route so there can be some noises at night. But unless you are a very light sleeper it should be alright.
The apartment is quite compact as described. Travelling with two (large) suitcases we had to move one to the balcony. But other than that we had everything we need and the place is very clean and lovely.