Martin and Bertha were very nice, helped us with a lot of useful tips during our stay in Barcelona. They are very kind and available to meet our requests. The place is not far from the City centre, about minutes away from the Green/Red line and 15' from Plaza de Espana by walking. The room was small but comfortable and fresher than the rest of the apartment that, being in the basement, was a little bit musty. Anyway, we suggest the accomodation at Martin and Bertha's apartment!