Aga is really helpful and arranged transfers for us to and from the airport. The location is within about 5-10 minutes of La Ramblas and there are heaps of cool Cafes downstairs too.
The apartment is up a few flights of stairs and we had a lot of bags, so this could be a challenge depending when you arrive - we were lucky Aga and her friend were there to help carry our suitcases up. Nice spot :)