We stayed with Mercedes for four nights. The room is basic but comfortable. Mercedes rents out three somewhat similar rooms (one with an individual, smaller terrace), two of which share a toilet/shower. The flat is decorated beautifully and has everything one needs (shower, kitchen). We were even offered breakfast and drinks, and Mercedes just is a super relaxed hostess, very talkative and nice :) There is a very friendly dog, Stevie, living in the apartment, too. Regarding the location of the flat, I would dare to say that there is none better in all of Barcelona. Place Reial is spot on in the middle of the liveliest part of the city, with lots of foot and shopping opportunities close by. Her flat overlooks the square with a huge terrace to hang out on. We had a wonderful stay!