You should stay here.
The apartment is up in Tibidabo, which is a thirty or forty-five minute commute from most of Barcelona. From the street out front you can clearly see all of Barcelona -- and on a clear day, Mallorca. The view is the first memory you'll make here.
Martha and her family are very warm and interesting. Take time to ask them about their travels and the history of the home. Their dog Black is enormous, and enormously charming.
The library and attached homes are really something. There's a pool, though it was too cold to swim in when I was there in November. The grounds are beautiful. The church and amusement park nearby are worth a visit.
The lodging itself is clean, comfortable and private. It has a terrific view. They have gone to some lengths to make sure that everything feels right.
I can't say enough nice things about this place or these people. I will be back.