This apartment's location can't be beat - pretty much walking distance to everything and right around the corner from the metro, Casa Mila and Casa Batlló. We hardly needed to take the metro during our 3 day stay because there were so many restaurants, bars, cafes and attractions within 20-30 min walking distance. Communication with Ingrid was fantastic leading up to our stay, and she arranged a taxi to pick us up from the airport which was very helpful after a long, tiring journey. The elevator was also extremely helpful (as they can be a bit rare in European flats) so that we didn't have to carry our heavy luggage up and down the stairs.
The apartment itself is spacious, well-appointed and looks like the photos. However, we found several cockroaches in the kitchen even though we didn't cook or eat there. Not sure how common roaches are in Barcelona apartments, but it was surprising to us considering that the kitchen seemed fairly clean otherwise.
Another minor issue was that the bath towels were not clean (either that, or they sat in the washer without being dried and just smelled like old towels). They weren't very pleasant to use after showering, but again, it was just a minor issue.