I had booked the apartment for a group of friends and can only say we were very happy!
Firstly, the location is great! Walking distances to practically all the attractions and shopping. Yet just away from the tourist crowds close to Arc de Triomf and Cituadella park. The apartment itself is located in beautiful traditional Barcelona apartment building from 1870 with only two apartments per floor making it a very quiet and very safe building. Inside the apartment there are four very big bedrooms which could more than comfortable accommodate 8 people. Something which I appreciate as from some previous experiences the bedrooms can be quite small some times. The decor is super and there very nice furniture and interesting items in every room. It also has rooms with some of the beautiful hydraulic tiles that this part of Spain is famous for.
All in all a fantastic stay and will be the preferred apartment for Barcelona going forward!