I had a pleasant stay here. The room was fairly big compared to most other airbnbs I have stayed at (and I have stayed at like 15 in Japan by now), enough space to open my large suitcase without having to parkour through the room. The location is good, you can reach Ueno park in like a 10 minute walk, Asakusa is 20-30 minutes on foot, Akiba similar range. It's in a quiet area and you will need to carry your luggage up the stairs so keep that in mind if you have large/heavy luggage.
As with most Japanese houses, insulation isn't the best but turning the AC on is enough to not be cold. Bathroom definitely shows the signs of how old the place is but the water is hot, there was no fiddling around with the temp - it was nice and consistent. Wifi was fast and reliable - which is rare in Japan!
Hisao let me store my luggage until check-in and was fast with his responses to questions! For the price I paid, this was super worth it and I'd recommend it to anyone.