I stayed at Al's place for one week and I really enjoyed it! Location is great - the neighbourhood Raval is super cool and VERY lively which I liked. I almost didn't use public transport and walked everywhere most of the times. The flat is super clean (amazing bathroom and kitchen!) and I was surprised how spacious the actual room was (considering you are in Barcelona to explore the city and you only want to use the room to hang your clothes there and sleep there :)). Overall I have nothing to complain about and I would recommend to stay at Al's place :)