The apartment is really well localized in a very safe neighborhood, with lots of attractions, restaurants, cafes, and a shopping center nearby. Is also very close to three metro stations, Hostafrans with connections to L1, Espanya with connections to L1, L3 and L8 and Plaça de Sants with connections to L1 and L5, so is very easy to go anywhere in the city.
The apartment is also very close to the Aerobus station where you can get a bus to go the airport in about 20 min.
Both the bed and the sofa are comfortable, the air conditioning is very good and the terrace was a great place to get some fresh air and to look at the sky during the night.
Elías was very friendly and was very flexible with us by letting us check-in earlier.
For us, the only downside of the apartment was the size since in the pictures it looks way more spacious than it really is. Especially the top part with the bed is very low, with an average height of 160cm~170cm we had to crouch a bit in order to walk to the bed. And also the description was mentioning that the apartment has shower gel and soap but when we arrived we didn't find it so we had to buy it. Although this, we would recommend this place :)