The apartment was perfect and I can't imagine a better neighborhood to stay in Barcelona (on the same city block as Antoni Gaudi's Casa Battlo - definitely worth visiting).
Our 7th floor windows overlooked the courtyard in the back of Casa Batllo, and you can also see Sagrada Famiiia in the distance. The place had a great feel - the building is old but very nice, so what it may lack in modern sleekness and amenities is more than made up by the charm of the place and the quality of the high-end, elegant neighborhood. It is within walking distance to most points of interest in the city, and there are many shops and restaurant nearby. It is located on a mostly pedestrian thoroughfare and one block away from the ritzy Passeig de Gracia (which is Barcelona's version of Paris' Avenue Champs Elysee or NYC's Fifth Ave.) The hospitality we were shown was outstanding and they were very accommodating of my changing itinerary (our flight landed 5 hours late). I would strongly recommend this apartment. It is not luxurious but it has character, is clean and comfortable, and provided us with a more memorable and authentic experience than I expected.