Cons: This place is not new, not very clean (though passable), and the amenities are not at a high standard. Expect to wash your own dishes and run the dryer for 3 hours to get your clothes dry. Expect to think twice about cooking/eating because the single cooking knife available is dull and there is no cutting board and the utensils are spotty and dirty. Even though there are 2 bedrooms, it is not a comfortable fit for two couples. Maybe a family with a kid or two.
Pros: Very nice, very safe neighborhood with Bicing right around the corner, supermarkets a dime a dozen, cafes, and both Sagrada Familia, Gothic Quarter, and Citadel Park very, very close-by. Maria is responsive and check-in was super easy for us.
Point is, if you are looking for a home away from home experience, this is far from what you will get. However, it is central and the neighborhood is very safe and beautiful and a great launching point from which to explore Barcelona.