Nicolas was a great host--very responsive and helpful. The apartment itself was very clean and had everything we needed. The view was awesome as well. Overall it was a great experience and would recommend.
I would echo some previous comments about the location leaving a little bit to be desired. I wouldn't call it the city center, and it was actually pretty empty around the apartment at night. Also it's a bit of a hike to attractions/landmarks (Lisbon is very hilly, haha).