I stayed here with my sister, wife, and son (toddler) when visiting family who live in Mitaka. I have been to Japan many times, so it was what I expected for the location and size.
Unit was as pictured, plenty of space for us for the 7 days we stayed. It was clean to what I would expect and simple amenities for our daily needs, but we would eat out everyday.
There were limited accommodation options available in Mitaka, so we were happy with this find and would recommend it to anyone else needing to stay in the area.
Short 8 minute walk to Mitaka station and then another 20 minutes by train to Shinjuku, so we could still enjoy doing things in Tokyo in the city each day.