We had a great stay at this appartment for 4 nights. It is really close to Sagrada familia, the next metro station, the supermarket and plenty of amazing restaurants! Moreover, it is very clean, cozy and fully equipped with everything someone might need for a fulfilled city trip. The elevator is a great bonus. We have had some struggles with the noises of the street close by and an old couple living next to us - the walls are thin as paper (but this might be normal for flats in Barcelona). So we will come back and pick a different floor next time :)
Regards from Munich,
Fabi & Nina