Great place and a very lovely host. The communication with the host was brilliant, Mercé was very helpful, polite, and understanding. The apartment itself was clean, everything was working well and our group of 5 people fit in perfectly.
The location of the apartment is also really good: it's located in a nice, quiet district, there are some grocery stores just 2-3 minutes away, and it's very easy to explore the city from there since the metro is very close (3-5 minutes from the apartment) and you can just simply have a 20-30 minute walk to some of the main tourist attractions in Barcelona. The check-in and check-out were very smooth (even though we arrived at the apartment only after midnight). In summary, this place is an excellent value for its money and we really recommend it to anyone who's visiting Barcelona.