Outstanding location, steps away from Placa Catalunya, nightlife (and corresponding noise), great food, metro, trains etc.
Main bedroom is bright and uncluttered, IKEA-style in a good way. Small bedroom with bunks is tiny and dark and only has one blind fixed window towards the staircase. In hot weather it would be something to take notice of since the apt only has fans for cooling.
Also, as we stayed over the weekend and had our balcony doors wide open, we had to "party" with people on the street well after 2am. It actually got the quietest around 8-9am after city cleaners finished their job.
Therefore, don't forget your earplugs/headphones or party hard BCN-style !