We stayed at Marcella Y Fabrizio's place as we moved to Barcelona.
The place is nice, and located right the hearth of the Barrio Gotico.
Every site in the centre is within walking distance, included the main beach of Barcelona (about 10 minutes). Also very close to two tube lines (5-10 mins).
The place is perfect for a couple, and there is everything you need to cook (pans, plates, glasses, cutlery..), and relax (a nice teli and a sofa)
Marcella Y Fabrizio are amazing host, they helped us with the courier as we were waiting from many boxes to be delivered. And they have been very responsive to any need/question during the entire stay.
Good experience, we highly recommend this place