We had a great time in lisbon and in diogos apartment. It is great if you are coming by car because there is a supervised parking place. Yes, the airport is near and you can hear and see a lot of airplanes, but we didn't recognize them anymore after a couple of hours. So this wasn't a problem for us at all. The apartment is just as it can be seen in the pictures, really modern, chic and clean!
I would come back if I came to Lisbon again :-)