The reason this didnt get a 5 star review is due to the 7 flights of stairs with no elevator. If you have luggage I highly recommend not staying here. However if you have backpacks and such, it's virtually perfect.
The bed is really comfortable, it's in a great location, not noisy at all, nicely sized apartment with kitchen and washer. It is literally right now to clubs and bars and Montjuic Parc is walking distance away. But do not underestimate those stairs if you have bags.