The apartment is 3 min on foot from the Sagrada Familia. The location is perfect to reach any part of the city as hop on and hop off stop is close as well as metro.
Our Apartment had windows to the yeard,so there were no noise , what is good if you want to sleep with an open windows.
You should remember that the flat is in the heart of the city so the flat is quite small, especially the shower and the toilet.
Overall,I would recommend this place for everyone who want to visit a city and reach the most exciting spots in Barcelona.