We stayed as a family of 4 in a corner twin room with sky tree view (level 11). We found Prostyle Ryokan to be a delightful new boutique hotel with quality fixtures and fittings. Traditional style with tatami mats and bedding on the floor. Best features were the large balcony looking out over the Sumida River and the Skytree, and the deep semi-open air bath (although this is very enclosed). Room size is not large and the ceiling height is quite low, but bathroom is big. Not too much interaction with staff, but the lobby is pleasant and free tea and coffee available by the entrance.