We really enjoyed our few days in the apartment, the staff was nice and helpful. It is close to the famous Sagrada familia, there is also several place to eat or drink around (breakfasts, restaurants, bars…).
In the apartment there was everything (even a washing machine and dishwasher) perfect for a week in Barcelona.
If you like very quite and calm spaces it is not adapted, we had some noise issues from the street or the neighbors (maybe it is something common in Spanish buildings).
In general we highly recommend.