I really love staying in Koenji. This is a nice apartment that is close to the station but doesn't get much noise from the trains. However, anything more than two people would probably be too cramp. The loft area gets really warm (which might be a positive in the cold months) and it takes quite a while for the a/c to cool it down. It is nice that the apartment also provides a fan, which you could use to blow the cool air at the bottom up to the top. I would stay here again on any short trips to Tokyo, but the lack of a laundry machine might be an issue if I planned on staying for more than a few days. Choco did provide directions on how to get to the nearest coin laundromat though! Everything else about the apartment is positive! It's got that Koenji vibe!