We had a thoroughly pleasant stay at Mercedes' apartment. She was very considerate, eager to give us suggestions on where to go, without being obtrusive. The room was exactly as advertised, clean and cozy. As for the apartment itself, the location is utterly perfect for roaming through the old part of Barcelona. On the beautiful Placa Reial, there are some tourist trap type cafés, but also some charming ones with plenty of character for relaxed evenings. Since the Placa is right in the middle of everything, there is plenty to be found for everyone within walking distance. Two major subway lines are also nearby. Also, Mercedes' beautiful apartment is connected to a wonderful roof terrace with a spectacular view over the surrounding city. My girlfriend and I had a great time. All in all, highly recommended!