We really enjoyed staying in Xabier's appartment. The flat is huge and authentically decorated.
The room was well furnished and clean. I was hesitant to book a place with a shared bathroom (only shared with another room occupied by guests), but this was not a problem at all.
We were truly impressed with how often that bathroom is cleaned! Basically every time somebody had a shower they cleaned everything and replaced the mats in the bathroom and it felt like new again.
There is enough privacy as the room was in the very end of the flat and had a separate lock. There was some noise from the street but we were able to sleep without problems. The flat was on the fifth floor without a lift so would not suit people with weak legs but this was clearly communicated to us before the booking was confirmed.
The location was very convenient with many sights and places of interest within walking distance and nearby metro stop can get you further quickly if required.