We stayed in Roberto and Elisenda's flat for 4 days. It is very well located, well furnished, with WIFI and very clean. We made the check-in with another person who was a very nice. He gave us the keys and answered to all our questions, and we really appreciated it as we arrived a bit late.
The location is very convenient as it's close to the Sagrada Familia, metro station and to a little supermarket. The neighborhood is great for having a walk, having a drink or dinner.
We would highly recommend this spacious flat which looks exactly like the pictures !