We stayed at Eduardo's flat for our wedding weekend in Barcelona as the whole family wanted to stay together.
The flat was perfect for a big group. Very clean and just as advertised. Very charming. The flat couldn't be located better, just a 3-5 minutes walk from plaza cataluña, and even though the street where is located is very busy, is not noisy at all.
About the keys delivery, it went very smoothly, just picked them up from his office about 5 minutes away from the flat.
In general we would recommend Eduardo's flat to stay in Barcelona!