My friend and I really enjoyed our stay at Vincenzo's home in Barcelona. The apartment was in a great location in the Gothic Quarter and walking distance to other lovely neighborhoods, such as El Born. Public transportation was very accessible for farther trips throughout the city. The room, living room and bathroom felt private, despite being a part of Vincenzo's home. We opted to use the living room as a second bedroom, which Vincenzo converts with a pullout couch (though please note you will be charged extra for this). The pullout couch was comfortable, and there was more than enough space for two people in the apartment.
One recommendation for future travelers in the summer: the apartment faces a charming square. At night, it is very lively - i.e., well lit and loud. If you close the blinds and the windows, the apartment is dark and quiet. But with the windows closed, it gets HOT. I would highly recommend bringing a sleeping mask and earplugs so that you can keep the windows open to enjoy the breeze, but mitigate the light and sound.