Mercedes' apartment is very central. It is well connected to airport with shuttle buses & trains (I used Aerobus from airport to Placa Catalunya for EUR 10.20 round trip). It is in the heart of La Ramblas & the Gothic parts so it was easy to walk & explore. The room was cozy & clean. Also on each of the days there were people staying in other rooms so it was good to exchange notes with them over what everyone saw. Mercedes was helpful with directions & suggestions & made the stay comfortable.