I spent 4 months at Ricardo's as an Erasmus student and the place is very convenient for this purpose. It's located very close to metro and bus stops and supermarket. Ricardo and his family have been very welcoming to me; he was constantly listening to my concerns and gave me advices about the city and its opportunities. I really recommand that you stop by Ricardo's so you can meet a great man who will make you appreciate even more your journey in Barcelona.