I stayed at this apartment with my family (wife and 2 kids), and can only say good things about my experience.
The location could'nt be better; a short walk to Paseo de Gracia with lots of stores and restaurants, and to Plaza Catalunya which is part of the “old town already” You will also find many options of local places at your feet.
The apartment itself is very spacious, clean and you can see that the owner takes good care of the details. The beds were really comfy and perfect to get some energy for our busy days out in the city.
WIFI worked really well.
The living room was the main thing, as we had very nice dinners here, with the view of the city from the top. The apartment is really quiet all day, and gives you the feeling of peace while there.
We would definitely come back here!