The apartment was perfect for our little group of parents and kids. The decor was simple and functional (it meant there was less for the kids to destroy :o). The staff was super friendly and it was really easy to get in and out. Right near the metro and a pleasant walk to many areas. Lots of green space in the area and playgrounds for kids. There is a farmers market in the same block (Mercat de Sagrada Familia).
Only negative was that most of the food in the area is pretty touristy because of Sagrada Familia.