I'd highly recommend staying at this apartment.
The flat is modern, comfortable, kept clean and equipped. Moreover, it's in convinient location - metro station, many local stores and bars in the close area. Centre is reachable by walk, also close to Montjuic and a port.
The host is very polite and communicative, offers help and information. There was an immidiate response for every question.
The stay was enjoyable.