Great, local location - not too far from any of the major sites in the area (10-20 minute walk). Perfect for 2 nights, or an extended stay - the kitchen and clothes washer give you the option to forget you eventually have to end your vacation. Make sure you carve out time in the morning to go to Pastisseria Cusachs - the ladies there are wonderful, and the pastries are amazing.
Though there is room for a family of 5-6 in this apartment, there seems to be a young, student vibe in the area - it is safe, but may be a little noisier than what may be needed for little children. The layout of the apartment and all the amenities are great. The separate rooms add privacy for multiple guests. Perfect spot for our first time in Barcelona, and Eduard made out trip even easier - great host, easy to work with, and even gave us an anniversary gift.