We have had a great stay at Alex and Audrey's appartement. They are warm and helpfull people. Although it is a part of their home, it's a seperate and private part.
Room and bathroom are really clean and the coffee, tea or hot chocolate to start or end the day tasted well!!
And to put a critical note: We didn't have had really warm nights so we didn't miss an airco, but I can imagine that it could be a 'problem' when outside temp. is higher.
Oh and the location is central and nearby metro, so a good place for discovering Barcelona.