We stayed at there for 5 days and we loved the place. First of all, due to kindness of Rosario we could have very perfect first impression of Barcelona.
The place was near to Sagrada Familie and good grocery store. We were with stroller for my little boy so the distance to grocery store and certain spot was very important. Although the place was near to public transportation, we used taxi most of time and it was very easy to get taxi near the place.
The place was cozy and clean and big enough for us to stay 5 days. It doesn't mean that it is big. However it was perfect for 5 days of stay for us. (2 kids 2 adults)
It was good that the place has air conditioner. Even in May the air conditioner was needed.
The only negative thing I can point out is the noise from neighbors. For common days it was OK, but for the day of UCL final game, it was really noisy. However, I think it must be noisy for all other places as well.