We stayed in Cathrin's apartment for four nights; we found it to be extremely clean, tidy and spacious. It had all the amenities needed for our stay (cooking facilities, air con, TV etc) and it was in a safe and secure building. It was in a perfect location - 3 or 4 minutes walk from the nearest station or 20 minutes walk into the main city centre. Overall, we loved it and would highly recommend it to anyone wanting to stay in Barcelona! :)