This place is a steal. It is located in the heart of the city, and you will always have something to do. Great food spots nearby. I come to Barcelona every 6 months so it is important to me to stay at a local area. The only issues I ran into with the flat is with the neighbors that live directly above this flat. They tend to be loud and it bleed through, so if you plan to sleep past 6:30a, or want to sleep before 11p, this might not be the best place for you.
Joaquin was super helpful, and his coworker who helped me settle in was very responsive. He gave me clear directions, and showed up on time. He introduced the entire flat to me and showed me everything one would have questions about.
Overall, lovely stay! Great location, Amazing Eats, and a flat that offers a lot.