We enjoyed our stay here! The apartment is very well located- walkable to a lot of the major sights, and easy access to the bus and metro. Alejandro was helpful and responded quickly. We appreciated being able to cook our own meals and do laundry in the apartment!
Be aware that there is a fair amount of noise from the street- you can hear every conversation that happens on the sidewalk! This was ok for a week, but maybe not if you're a light sleeper.
Overall, a great option for staying in Barcelona.