My husband and I stayed there for a few nights and it was a great base to get to all the sights, including the gothic quarter, la rumbla, gaudi exhibits, and la Sahara familia. We could walk to them all in 10-20 mins
Apartment is clean, comfortable, and very spacious. The only thing to note is that the apartment is darker (I.e. Less light) than shown in photos.
Julia was easy to deal with, she was very responsive and offered recommendations for Barcelona, as well as other places that she knew that we were going to later on our trip.