The Serennia Comfort apartment was great for our week in Barcelona. It is located very near to the Plaça Catalunya, a very central location from which the entire city is reachable (by foot, metro, bike, scooter, taxi, there are many options). The apartment itself is complete, having four bedrooms and three bathrooms. You also have a cool view from the living room and from the master bedroom. The check-in was flexible and smooth, just like the check-out. Definitely recommended.