It's hard to add anything new to the previous reviews other than to confirm the positive comments. Communication with Mar was quick and easy. She met us at the apartment at a time that was convenient for our arrival in Barcelona. As her listing states and other have noted, Mar has provided a book of brief reviews of places to to eat in the neighborhood and beyond. These are places that I believe she personally likes and recommends. In just the immediate neighborhood around Mar's apartment are many places to eat and drink and having personal recommendations makes a huge difference.
The apartment is extremely clean and well equipped. We stayed eight nights and cooked a few meals there, and everything that we could have wanted, and more, was there.
In addition to many restaurants, bars, and cafes, there is, of course, the San Antoni market just across the street and smaller food markets of varying types within a few yards of the apartment. There are so many great looking places that you will leave sorry there was not enough time to try them all.
We are glad that we stayed in San Antoni. The number of visitors in Barcelona is mind boggling. It was great to be able to spend some time in a neighborhood that was interesting and lively yet a few paces off the main tourist track. To walk to the Cathedral, or to the Miro Foundation for example --- in opposite directions from the apartment --- is about 20 minutes. Interesting walks in each direction. And, of course, when you don't feel like walking, there are two different Metro line stations very close. (The Barcelona Metro is very easy for visitors to use, inexpensive, and trains are frequent. We rarely had to wait for more than three minutes when we used the Metro.) From the airport the Aerobus seems to be a good way to go. It's frequent, inexpensive, and you don't have to make transfers with luggage --- a disadvantage of the Metro. One of its three stops is a few blocks from the apartment.
If I were to point out one thing in Mar's listing that stands out it is this: She states that she furnished her apartment with a high quality bed and linens because she believes travelers will appreciate getting a good night's sleep. This is a good example of Mar's attitude towards hosting. She does not skimp on the important things and is very attentive to what guests might want and need.
We highly recommend this place.