Carlos was a terrific host. He's very generous with his home and with his time and made us feel very welcomed, sharing meals, drinks, etc while we were in the flat. He seems to really enjoy getting to know his guests and helping them make the most of their stay. Location was great, close to Las Ramblas and the metro. The room we stayed in is small, but it's sufficient and you shouldn't be spending much time there anyway! Highly, highly recommended.