I would recommend this place to others.
Host's is very responsive, with detailed guide on everything you need to aware. Location is excellent, 1-mins away from Yoyoji station and 10 mins walk to central of Shinjuku.
Place is clean, with nice touch of body moisturizer and a good hair dryer. Literally have nothing to complain, if you really want one, the air conditioner for heat generation is kind of slow.