The photos of this place absolutely do not do it justice. It feels as thought the Sagrada Familia is towering over the terrace. The terrace itself is huge! A lounge area and an eating table for 4 was fantastic to have on warm summer nights.
About the noise, yes the walls are thin and you can hear the neighbors but this is across the street from the Sagrada Familia in the center of Barcelona! If you want soundproof this is not the city for that. The neighborhood itself is very quiet and safe with a pharmacy across the street, a 24 hour store downstairs and plenty of bars and restaurants within walking distance. The washer/dryer combo was also very useful to have.
Carles as a host was amazing! Super responsive and more accommodating than any other Airbnb I’ve ever stayed at. He really cares about his guests. When the blow dryer in the apartment stoped working, he had a new one brought over that same day! Book this place without hesitation!