It was a great experience. Close to public transport, clean, enough space, good shower, good kitchen.
Also walking distance to shops, restaurants, everything we needed was close.
One point of to take into account when travelling together: the walls inside the appartement are somewhat thin.
Yk answered all our questions in advance of and during our stay, quickly and very friendly. I wish we had had the opportunity to meet. Also great: the possibility of leaving our luggage early, so we could go to Ueno park. As soon as the appartement was ready, Yk sent us a message so we could go in. I would recommend this place.