Overall, very nice stay in a nice apartment!
Apartment: Looks same as on the pictures, has everything you need for a stay (Fully furnished: beds, dishes, towels, good internet connection,...etc).
You just need to watch you heard because of the stairs (not an issue for little kids)!
Having a gas stove was great, the oven was really good too (cooked very well our meal for the new year's eve!)
Location: Away from the noise and touristic places but close to everything by train/metro. There is everything you need in any direction you take in 5 min walk(Mercadona, Carrefour, shops for buying fruits and veg, fast food, restaurants, a park and loads of hairdressers!)
The train station is 5 min walk from the flat and takes you to the center in 7 min (train) and in 30 min straight to the airport for about 4 euros. It is also very well connected with the metro
Host: It was a pleasure to meet Camille. She is very friendly! She was really responsive to any of our requests even when she was away from Barcelona. She speaks at least 3 languages!
to conclude: I would go back there if I had to comeback to Barcelona