The apartment is quite nice - functional and well decorated. Kitchen also well equipped - I just missed a Nespresso machine :), but I have to say that the hosts left a coffee maker (and coffee power) at our disposal.
The balcony is too close to the backyard of the first floor apartment, which could be troublesome depending on the neighbors you have (not was a problem for us).
Location is also quite good, walking distance from two metro lines and several bus lines, as well as to the Montjuic Park. We had a little issue with the shower but the hosts promptly came in to solve it.