The apartment had an excellent location near the Rambla of Poblenou, the beach, a Metro station, supermarkets and restaurants. The staff were super nice and accommodating, and communication worked without any problem (in Spanish).
The only shortcomings of the apartment were that the photos need some updating (it looks quite older and slightly dirtier now), and that it is quite dark (it is located in the ground floor and there is a building in front that prevents light from coming directly into the rooms).
We were mostly out during the day, but the wifi worked well while we were there.
Some noise could be heard from the street at some points during the night, but nothing too loud.