This place was great! It was very central, clean, and spacious (it was a family vacation, and we felt like we had plenty of space).Paulina was very helpful and friendly.
Gracia is in a quieter, residential area, and were walking distance from many great non-touristy restaurants. Also if you don't have any restaurant options, the apartment is above a restaurant, so you can just go downstairs. There are several markets near by if you want to pick up groceries. The apartment is also across the street from a taxi stand, and a few blocks away from the metro.
I would stay here again if I go back to Barcelona.