This is a great budget flat in the center of Barcelona! It is located about 20 min walk to La Rambla. There are a great number of bars, cafes and eateries on Ave Blai, which is around the corner. Metro (Parallel) is 5 min walk. Tip: as for the airport, you can take bus 46, which goes along Ave Parallel and stops by Parallel metro. Its the city bus, so you can use your 10 euro ride pass for 10 rides to catch the bus to airport.
Overall, the apartment is a good budget place. Quiet at night but close to city center. Walkable to many places. Thank you!