The host was very accommodating. We arrived early and she made arrangements to store our luggage while we were out sightseeing. She also provided lots of good general information about Barcelona and tips for places to see and things to do.

For what it's worth, the apartment doesn't seem to be someone's private home, but rather one that is owned by investors for the exclusive purpose of renting to airbnb customers. This didn't impact our experience in one way or another, but I just thought I would mention it if anyone was curious.