Our stay in the apartment was good. We had no problems with the check-in and everything was clean at our arrival. Only the shower could have been better-the water leaked out after using it :/.
Futhermore we were located at the harbor. The beach was 1min. away, the bus stations were right around the corner. The metro Barceloneta was 10min. away. So we could reach all sights in a short time! When you take the bus from the airport, use the blue aerobus (5.70 Euro-around 15min.) to Placa Espanya, then switch to the bus D20 (2.20Euro-25min.), who brings you directly to the flat :).