The apartment is not luxurious but has everything you need. I was really happy that there was some coffee for me to make a cup before I could buy some. We didn’t think it was noisy at all but we were there off-season.
Tonatiuh is a super nice host. He let us check in 2 hrs early but then he had to wait for us for 30 min because we took the wrong street after getting off at Ribera. Later there was a problem with the heat in the apartment and he came right away to fix it and even brought us an additional space heater which we really appreciated.
The location is fantastic. At first you may be put off by the narrow streets and lots of stairs but this is part of the charm of the old town and there are super cool escalators on the way up. We found the most authentic shops and really good restaurants (recommend Los Fuentos) there and you have easy access to the green line from Ribera and the metro and intercity lines (to Getxo, Bermeo, San Sebastian) from Casco Viejo.