I had a really great stay at Roger's family's home, as most others on here I didnt get to meet Roger but his mum made me feel very welcome and was lovely to chat to! The location is excellent too, I only stayed in Barcelona for 2 days so it was important to me to stay in a central location, and the appartment was located centrally near the charming alleys of the gothic quarter, felt very safe too (for me as a girl travelling alone) - I didn't use any kind of public transport during my stay, explored everything by foot, and could easily reach everything from the rambla, to the barceloneta beach, park güell etc etc!
I would definitely not hesitate to stay with the Sunyer family again if I return to Barcelona!