While the building itself is rather old, Angeles' apartment has been renovated and decorated in a way that makes the whole space feel modern and fresh. It's definitely a very comfortable place to stay in, and it's easy to feel at home. The one downside to the apartment itself is that the windows are subtly stained glass, so unless you open the windows, you won't have a view of the outdoors.
The real value of the apartment comes from its proximity to the metro station, though, which makes it an excellent place from which to explore Barcelona.
Finally, I should say that Angeles is a great host, communicating responsively and leaving nice little touches in the apartment, like a bottle of wine and some baked sweets. My flight into Barcelona was delayed by several hours and I arrived at the apartment late at night, but Angeles kindly arranged an easy check-in nonetheless.
Thank you!