On the positive side, the host was friendly and the flat was quite clean overall and well located (700m from the metro stations and car parks nearby) + it had A/Cwhich is a good thing in the summer.
However, it should be pointed out that the flat is MUCH smaller than it seems, and that the building is not quiet (neighbours who party constantly even during the week until 3am), so it's not an idyllic setting when you don't go to Barcelona for the party!