Francesco's apartment is small but cozy, with a stellar view both at day and at night. Francesco is very friendly and flexible; we were able to check out late because no guests were arriving the day we left, which certainly made us feel welcome. Francesco was not able to welcome us himself at the very beginning of our stay, but his friend Isaac was very friendly, punctual and gave some good tips on where to go to in Barcelona.
All in all our stay was great and we felt very welcome. I would definately recommend staying in this apartment as it's close to the center (only a 6 euro taxi ride from the ramblas, about 10 minute walk from the Sagrada familia and about 15 minute walk to the beach and the clubs at the beach), but quiet at night.