The location is just perfect, 5 min from Sagrada Familia, metro, bus, bakery, self-service laundry, supermarket, restaurants and pharmacy (24h/24h open). The apartment is very clean, has everything you need to feel you like at home, the furniture is fancy and even if in a very central part of the city is very quite inside. We stayed 2 weeks and did not miss a thing.
There is a library with plenty of maps, guides and books about Barcelona.
Alex is a great host, he showed around the apartment and spend plenty of time to give us lot of suggestion and the dossier he left in the apparent was very useful. During our stay was always available for any question or problem.
Great choice for Barcelona, we can just recommend it!