The place is good, but the pictures shown here are slightly different than the real flat (the disposition of furniture and the overall "niceness" of the rooms, for example).
The building is located in a busy street, so there is a lot of noise coming from the outside - and also from the inside, from people staying in the other flats. This is not the owner's fault, but it should be noted.
The place is located in a good area, close to public transportation, supermarkets, bars and restaurants. It is also close to the La Sagrada Familia and other important touristic attractions. Communication with owners was easy.