Ari is a very attentive host, always quick in responding. I had a great 2-months stay in his shared apartment. I really liked my room with a small balcony to sit by during the evenings, a desk to study/work at and a private bathroom. The apartment is very centrally situated, close to everything. Nearby is both the green and purple metroline which takes you practically everywhere in Barcelona. The closest surroundings (Raval) is a little bit rough though, but I never had any problems. All in all, a very nice place to stay.