This is a great little place to crash at the end of a busy day of sightseeing in Tokyo. No better place to stay in Tokyo if you want to visit the Tsukiji Fish Market (until it moves in October), because it is literally across the street. I rolled out of bed at 3:45 AM and was in line for a tour by 4 AM.
The room is TINY, so I would not recommend it for couples, but for solo travelers in need of a sparkling clean spot to sleep, it's perfect. The washer/dryer combo, hot plate, kettle and fridge/freezer are all great amenities.
My only criticism would be that the communications and instructions can be a bit difficult to understand - some strange and lengthy translations coming in at different places on the app left me a bit confused at check-in, etc. With a little language patience, it was all-around a great stay!