This place is a great deal in an awesome location. The room was clean and spacious, with a locking door which was a nice touch. When we checked in they gave us some recommendations for food in the neighborhood and even have a full guide they put together with tons of suggestions! We would definitely stay with Xavi again next time we're in Barcelona.
The one thing I'd mention is that it looks out over a main street and is pretty noisy, even at all hours throughout the night - although they graciously provided ear plugs for us.