Maria-Fernanda was very friendly and personable, but was out of town during our stay, so we didn't meet her. Milli the housekeeper checked us in and out and showed us around the flat. She was very sweet but didn't seem very familiar with the street bearings.
The flat is clean and airy, with a fully equipped kitchen, etc. The master suite is spacious and airconditioned. There's a ceiling fan in the second bedroom, but it got uncomfortably hot. Oddly enough, the dressing room adjoining the master bedroom had an airconditioner and was quite large, so we moved a mattress into the dressing room and used it as a bedroom for my daughter, which worked out well. We moved the mattress back before checkout, of course.
We were a tad disappointed that unlike other super-hosts in our experience, our host declined to book a taxi for us at our arrival in Barcelona and directed us to a taxi website, which we couldn't access on our AppStore. But we hailed a cab upon arrival, so no harm done.
The flat is in a nice, quiet, residential area, and very close to the Sagrada Familia, and we had a very nice stay in Barcelona.