I stayed in a room on the first floor for two nights.
The location and price were great when I concider the place is right next to Yoyogi Park. It takes about 10 min from Shibuya station on foot.
The room was clean and big.
It is surrounded by other buildings so it is hard to see sunlight even in the morning. Without lights the room is really dark but it was ok for me since I was out all day till 7 pm.
The host replied in 1 or 2 hours or so.
I think it was quick.