We had an amazing stay in the apartment literally 3min walk from Sagrada Familia and less than 10min from Hospital de San Pau (really hidden gem of Barcelona). The check in and check out was easy and smooth (plus you can check out at 12 on the last day which is really nice if you want to leave the luggage for a bit more). The apartment itself is big enough for 3 people and very quite as it's located in the inner courtyard side. Ideal if you want to have a nice rest after intense sightseeing. Overall highly recommended!