This was the first time I had used airbnb to book an apartment and it was really easy. The apartment was fantastic in every way - clean, modern, well equipped for the 5 people (3 bedrooms, one with two single beds) in total that stayed there - just like the photos we'd viewed beforehand and the description provided. We were allowed to drop off our luggage before check-in which was really great. Well located just off the main Catalunya square (but very quiet) and near the metro. Most places were within walking distance. Try tapas at the market off La Rambla. Buy fresh fruit there for breakfast. It was perfect to have two bathrooms between the five of us and make coffee "at home" before venturing out. Air conditioning is a real bonus as it was really hot during our 3-night stay. Hope it's available next time I want to go to Barcelona. If you're flying in, just take the bus or metro from the airport to the main square.