The apartment location is awesome, right in the center of everything. We walked everywhere, from Barri Gothic to Sagrada Familia, and found food and drinks (stay or to go) literally within minutes of the apartment (tip: Mercadona at Ronda Sant Peres 31 is great value for food to cook).
This comes with an unfortunate counterpart: the surroundings are crowded, so place is pretty noisy - not an issue if you're out enjoying the night, but don't count on an early evening sleep :)
Eduard was the perfect AirBnB host, available but not in-your-face, and check-in / check-out were very easy.
To sum it up, we highly recommend it for a short stay for 1-2 young couples.