The apartment's location is great. Right below the apartment is a small supermarket. There's a metro nearby, which is a 2-minute walk. However, you can walk to tourist sites such as the Sagrada Familia, Casa Batllo, Plaza Catalunya and Las Ramblas. There is a school at the back but we weren't bothered much by the kids playing as long as the windows of the two balconies were closed.
Lijie and her husband are very nice and instantly responded to questions and requests made during our stay. Thanks Lijie!