I would like to recommend a website that offers hotels and appartments in Barcelona. I'm visiting my favorite city Barcelona every summer and booked a few times at http://www.barcelonapoint.com
Here you can find not only family apartments, but also economical apartments with discount prices. I was staying in several apartments in the heart of the Barcelona city center. They were all well-equipped. Last time I had a roof terrasse with a wonderful view over the avenue. The service is great, too. I booked and next day, I received the confirmation. The booking process was done easily without complications and problems.
I hope I could help everybody who is looking for an accommodation in the wonderful city of Barcelona.
See you ...