The place is not far from Nakano station on a JR line which currently has some repairs going so there aren't any lifts working. We had to use the escalators but that proved difficult for big suitcases and a stroller. Besides from that, the signage to the building wasn't great. We went past the building a few times as Google Maps indicated it was on a road when it was actually a walk way into the front entrance. Finally the host wasnt answering emails as we asked for early check in and we didn't get any answer until an email seems like an automatic notification on the last day providing us information about the checkin.
Apart from the above issues, the apartment we stayed in was spacious in Tokyo standard. Everything was clean and working. The beds were comfortable and there was Netflix available.
Overall it is still good value for money for a Tokyo accommodation.