The flat is just like in the pictures which means it's very beautiful. It was a bit cold but we stayed there at the end of march so that won't be a problem during summer. The connection to the city center isn't the greatest, you actually have to climb up a hill to reach the flat but on the other hand it's very quiet at night.
My boyfriend states that the bed was the most comfortable bed he ever slept in. The kitchen contains everything you need to have breakfast or cook dinner. There's also the basic stuff like salt, oil and sugar which is very nice. The bathroom has a big and nice shower, the only thing that's missing a bit is that there's no holder for shower gel etc.
The whole flat was very clean and Catarina was a very nice and helpful host. We'd definitely recommend the flat to friends who plan a Lisbon trip!