We are a family with two children, (11 and 15) and we had a really good time at Casildas lovely apartment.
It was very clean, nice interior and really good facilities.
The location was excellent, 5 minutes from the beach and many good restaurants and beachbars and about 10 minutes from the metro station. The neighbourhood Poblenou is sparkling and interesting to explore.
We would come back any time :-))