We had a great time in Barcelona, the flat was clean, quiet and the bed was comfy. Check in was easy we arrived early and left our suitcases and then met by a friend of Romina's who walked us through the flat and guides etc.
There's a supermarket 2mins away and the Parc Guell 15min walk away. There is a metro Joanic thats close to the flat, if your planning on walking into Barcelona it's about 30-45min walk.
Romina was great and was always contactable if needed.
I would suggest that if you want a taxi from the airport to the flat to get it yourself from the airport. There's a taxi rank and it's takes 20-30mins and was €25-30, from the flat to the airport we walked up two street and hailed one within seconds.
All in all great stay :)