I spent a week in Barcelona with my mum and I found Isa Y Juan place perfect for its location, you could go everywhere by foot in less than 30 min or take the metro (or the train to Montserrat) at less the 2 min from the apartment ! The place itself is nice with a fully furnished kitchen and a nice balcony (to enjoy in sunny and warm days)! When we arrive, the weather turned to be cold and Isa let us use the air conditioning, because the place lacks proper heaters. During the night, the apartment is a bit noisy, but we were so tired from the visiting that it did not matter!