Nice apartment in a very central location in Barcelona. Just outside of the apartment there are plenty of bars and restaurants and stores, but the street You can definitely hear noise from the neighbours during the day, but for us this was not a big problem: no noise during the night or early mornings. It may be more problematic if you're planning to work from home. There's not much natural light in the apartment, it being on a first floor and facing to an inner backyard. However, the apartment itself is really charming and well-equipped. The location feels safe and the metro (L1 & L2) is less than 2 minutes away, with other lines within a 10 minutes walk. The apartment was clean when we arrived, but not spotless - there were stains in some of the sheets and some dead ants near one of the windows, but nothing too problematic.
Overall we loved the apartment and really enjoyed our stay!