Matthew was a kind, empathetic host who tried to make my stay as comfortable as possible. He's very open to communication and we had interesting conversations about many things. He also invited me along to see a movie screening at CaixaForum which I enjoyed.
The flat is 30 minutes from the beach on foot, 15 from La Rambla and close to both the Arc de Triomf and Urquinaona metro stations. A good base for exploring the city.
There isn't air conditioning in the room. Even in July, though, the night can be chilly, so there wasn't any real need for AC.