This place is small but cozy. If you travel to Tokyo alone or as a couple, I'd recommend this place.
It right next to the Koenji station with a direct train line from Tokyo Station/Shinjuku Station, which makes it easy to commute to and from. Also, it has so many little cute pop-up shops, as well as major famous food chain restaurants, you'll be able to experience local lives and good food without waiting in line since it's not one of the well-known districts for foreigners.
The host was away during our stay, I think, but we was welcomed by Aiko. She's super nice and responsive. She answered every of our questions and sharing local information.