I stayed at Laia's place for a weekend and I was very happy with my choice. The flat was easy accessible, close to the Parc Guell. The flas looks even better than in the pictures, it was very well equipped. (It did not have cork screwer, so we bought one for the next guests :) ), very very clean, nice and welcoming. From the airport I would suggest a taxi to the flat, but also the subway is close. The building was clean, no noise and no loud neighbours. The access is made by a code and it was very easy for us to go out and come back as many times as we wanted. I would definitely recommend it!