Azucena's place has a great location. It's a calm residential area up Poble Sec. The building itself is more than a hundred years old! There are tons of restaurants, cafes, bars and supermarkets close to her residence. Azucena is a nice person to talk to and is very helpful. Not just giving general guidance about the place, its culture, food, safety, etc., she also lent me an umbrella for the days it was raining.
As written in the description, there are steps to reach her apartment on the 1+3rd floor. The staircase is steep and narrow, so climbing with heavy luggage may be difficult for some. But being on a high level, the apartment has very nice breeze.
Manoeuvring inside the bathroom may be tricky for those who are not used to small and tight old European bathrooms.