Staying at Rafa's was great. His apartment is huge indeed and charming, and it has everything you need. Rafa was really nice and helpful and made me feel comfortable in his house. He has a good very relaxed energy to host people ;)
Gracia was a great neighborhood, just far enough from the center's noise and tourists, but with plenty of things to discover. I had a great stay in Barcelona at Rafa's. Thank you!