I stayed with Xavier, his brother Faust and Betty, the cat, for 5 weeks and I had a great time. It is a quiet and clean home which I appreciated very much. At the same time, Xavier was always very helpful when I had any questions. He especially made sure that I didn't miss out on the typical Catalan and/or Spanish traditions.
The apartment is cleaned by a professional cleaner every week, that was a pleasant surprise for me.
The location is convenient if you want both: access to the beach/port and to mount Montjuïc. It's right in the middle. La Rambla, the Nautical Museum, the metro station, supermarkets, pubs, and cafeterias are just around the corner.
What I really appreciated was that Xavier helped me with all my lagguage at the time of my arrival. He also allowed me to have my bike in the unit. I thought that was very generous of him and a nice gesture. In all, I can absolutely recommend staying with Xavier