We had a lovely stay at Magda's Gracia apartment. The area is central to attractions with lots of good restaurants and bars that are less touristy than in other sections of the city.
The apartment is large, clean, and fairly well equipped. As others have noted, the front bedrooms face the street and are noisy until well into the night, but it is a city location so that can be expected.
Plenty of good quality linens and towels were provided.
It would have been a plus to have a few basics provided just to get us started like toilet paper and garbage bags, along with instructions on what how to sort and dispose of garbage. Also, an instruction book of how to operate the stove and washing machine, location of nearest grocery store and market, and favorite restaurants would be a good idea. We figured it all out without much trouble, but for people who haven't rented apartments in Europe before, these additions would be helpful.
Magda was responsive and helpful for all of our needs. She allowed us early check in, her daughter met us promptly at the appointed time, and Magda even booked a taxi for us as transport to the airport.
We would not hesitate to stay in the apartment again when we visit Barcelona. Excellent value, great location, and kind host - always a perfect combination!