I enjoyed my stay at Midori's place - she was attentive and check in was very smooth. She kindly let us leave our luggage a few hours before the actual check in time as we arrived in Tokyo very early in the morning and needed a place to leave our luggage while we explored the city.
The apartment was clean and very easy to find. It was slightly far from the actual Shinjuku station (1km) but it was an easy walk and we never got lost. Though it was slightly small, the apartment was clean and the toilet was very nice (we loved that it was electronic!). Would definitely recommend this place to anyone looking for an affordable place in the Shinjuku area to stay in.