I find the meaning of airbnb when I was staying with Joseph and his family. They were always welcome for answer any questions about Barcelona and anythings even shared ideas of cusine, gastronomy...we praticed English together too, haha.
For the room which I stayed, it's suitable and good enough for a few days trip. The neighborhood is good with restaurants, supermarkets, covenient and quiet even the Sagrada Familia is just right next to the appartment. What else...may be you should stay with them and enjoy a wonderful trip like me, if you love to travel individually and want to discover not just only the city but communicate with local instead of stay at a luxury hotel. (`seems like an advertisement hahahaha, but I was enjoyed staying with them.)