This is a really nice place, very clean and the high ceilings make it feel quite spacious. The beds were superb. The hairdryer is awesome (important to me). The windows were thick and blocked out a considerable amount of street noise. The metro does rumble below but it never bothered us. We slept great, felt very safe and had a very comfortable time for our week long stay.
The location is very convenient. The Plaza Catalunya metro station is a main hub, quickly taking you with frequent trains to anywhere in the city. The Gothic quater etc is also easily accessible on foot from the appartment. We prefered to be above ground to experience the city more and with good walking shoes basically walked avery where from the apt. Even to the beach!
There were 2 adults and 3 girls in our group. The two full bathrooms were very handy!