It will be a cliché but I must write it that Carlos was a perfect host! We were guests in 3 different Airbnb's hosts during our 10 days holiday, and Carlos's place (and Carlos;) was the best. First of all he is (already) very experienced with airbnb guest so he has everything arranged - I mean when and what to tell you. He will tell you about nearest neighbourhood, where is store, than he will tell you about the flat and in the end about the city. All the time he's open to any suggestions or questions. The flat is very clean, the room was very comfortable and nite. Communication with the Barcelona center is very good - only few metro stations. I recommend Carlos place sincerely!