I loved my stay! The room (and the view) was exactly as promised. The immediate neighborhood is, as you might expect, a touch over developed for tourism, but it isn't a long walk to areas near Gracia, and the metro makes the rest of the city extremely accessible. And you cannot beat waking up to that view!
Silvia did everything possible to make it a magical experience. She is a real expert on the city and whatever your interests are, she will have amazing suggestions and hidden destinations for you to seek out. I would go back just to have her view of the city. She really reminds me of earlier days, when Airbnb felt much more personal in the best way.
All in all, highly recommended, and many thanks to Silvia!