We, two couples, stayed in Marta&Pauls apartment for 4 nights. It´s in the center of Gracia district, you step out of the door and are amidst restaurants, cafes, hip stores. Very safe neighbourhood. We love this part of Barcelona.
Two of the bedrooms are very quiet, only one the bedrooms is next to the street, where you have some noise during the night. The apartment was spotlessly clean, communication with Marta&Paul perfect and easy. We´d book it again.