I stayed at Itoe's place with three other friends and we fit just right, considering the usual lack of space for Tokyo's accommodation. Check in process was hassle free and the place was neat and sparkling clean. There were lots of amenities in the house too. Itoe's place is only a 3-min walk from the nearest station so we had pretty good access to the other parts of Central Tokyo. We had the whole floor to ourselves and it felt great, like we were living in a pension house with the lift serving each floor privately.
The only down side was that we were right by the main road so we could hear people talking on the streets and cars on the roads at night. Curtains in the room was also a little thin so it was too bright to sleep late into the morning.
Everything else was great and I totally recommend this place if you are looking for a short stay away but not too far from the bustling areas in Tokyo.