Everything was exactly how Mauricio describes it. The flat was very clean and quiet and is very well located. You can easily reach it from the airport and it is very close to three different metro stations which makes it easy to explore the city. You can walk to the Placa d´Espanya (5 min) to see the very nice fountains on Friday and Saturday evening.
Mauricio is a very friendly person and helped us with a lot of information. His advice about the metro and some good restaurants helped us to save a nice amount of money. And we already miss Arnau, Mauricios crazy dog-like rabbit that lives in the flat as well :)