My mother and I stayed in Maria's place in December. It was a great location, we loved walking all over the neighborhood, it was not far from several useful bus stops (~5-10 min walks to each).
Beds were comfortable, heating worked great and the couch was a good second option on the nights when the street noise was really loud. I am a pretty heavy sleeper so I would say if you are not and street noise would bother you, just stay in the middle room or maybe bring ear plugs. For me, the proximity and neighborhood far outweighed the sounds from the street.
Maria was attentive and quick to answer any questions we had so our stay was very comfortable and I would definitely return.