We appreciated being able to leave our luggage before check-in. Location pretty good - about 7 minutes walk from the station. Station is not on the JR Yamanote line, so you will need to transfer first but no big deal. Nice walk to Yoyogi park and funky cafes near there. We enjoyed the nice curries and drinks in his downstairs restaurant.
CONS - the whole place is dark and has a smell of cigarettes and mustiness. Mostly from the lack of windows and airflow. We had trouble sleeping in the upstairs bedroom because of this, but once we opened the windows to get airflow, this improved. I would suggest airing the rooms before guests checked-in - to remove cigarette smells (left from prior guests?). I know it says no smoking, but if guests smoke near the front door, it just goes into the house, not to mention being on their clothes, etc. Also, please keep the air-humidifier on to improve air quality. We only turned this on ourselves after experiencing the bad air quality.