we stayed for three nights and would definetly recommend it.
the location is great, in a quiet neighborhood, with two close subway stations (you can reach the oshiage station from narita airport by subway). communication was super quick. we were surprised by how clean everything was and all the equipment (towels, toothpaste, shampoo...). on our floor there were two toilets and one shower so it was never inconvenient to share with others.
the room was small, but two small suitcases fit easily. you can hear the traffic if you open the window and sometimes the other guests, but it was totally fine.
for the price a very good option.