The apartment is decorated with great taste and very clean. The location is great for people who wants to stay close to the airport. It is also a quiet neighborhood.
I'm sure there were certain rules (e.g. shower time, bed time, and you have to be extremely careful with sound in the night) that Isabel wanted us to follow but she didn't tell us beforehand. So it really felt like we were intruding her private space.
My advice for Isabel: guests are all traveling from different places in the world, and we have no idea about what you expect us to know. If you wanted everyone to follow your (or as you said, the portuguese) rules, at least say it or write it down beforehand. It just makes everything much easier for both side.