Luis's apartment is close to metro, central and modern. Very spacious clean and convenient. Luis is very helpful and easy going. If you ask him, he will accomodate your needs as much as he can.
There's a supermarket one block away and it's open quite late. Also there are a lot of chinese restaurants around if you're tired of Spanish food. If you travel by car, B:SM at Barcelona Nord (bus terminal) has a great 1,3,5 day cards which lets you access 40 different parking lots, which helped us tremendously. This apartment is a catch, take it!