I was 3 nights at Maria's place. I had the room with private bathroom which was very good, clean and useful.
The location is excellent as it is next to the Generalitat metro "Reina Elisenda" and very good bus connections.
The place is next to a lot of nice parks like shakespeare, Pedralbes monastic; but if you are a nature lover then I recommend to visit the Oraneta park.
Maria is really nice and she is always ready to help you.
As is saying the advertisement, lots of shops and supermarkets at walking distance.