Inside a typical (of the neighbourhood) and pretty uninspiring exterior, Diego's apartment is a little jewelled wonderland of funky lighting, interesting artefacts and useful touches. The living room is spacious, the kitchen well-equipped, the bed comfortable (this is not always the case).
The locale is a typical Barcelona suburban area - lots of apartment buildings with small shops in the ground floor. It's handy (easily walkable) to several Metro stations (Poble Sec is the closest), and there is a LOT of good food to be had nearby (try Carrer de Blai for an almost unlimited selection).
Diego has a useful set of notes for good local places to eat and visit. Check in is easy (personal introduction). Overall, a great place to stay. Just don't judge this book by its cover - the interior is much better than what's on the outside.