The apartment is very good and Mariona is a very friendly and helpful host.
We stayed here for a month with 1 y.o. kid and it was very pleasant. The place is safe for kids. In general it's very convenient and has complete set of the things you might need for an extended stay.
Mariona was very responsive and helped with all our additional requests.
The neighbourhood is also good, has plenty of shops around and a market. It's also a 5-10 minute walk to park Guell.