This apartment is fantastic. It is a <10min walk to Plaza Catalunya and La Rambla, near major bus/metro stations, has supermarkets and stores/restaurants around.
The place was neatly cleaned and maintained by professional administration. Lots of thoughtful touches, such as music speakers, table games, books, guides, etc. It is on a second floor in a corner, so starting at 8am it gets noisy however the bedrooms are on the other end and a bit isolated from it. Recently remodeled with nice touches, inviting, and offering a relaxing atmosphere - which was great after walking all day in the busy city. We were a family of 4 and quite comfortable, it will fit 6 people as well. If going back to Barcelona, I would go to the same place.