The location of the apartment is fantastic, walking distance to almost everything in central Lisbon.
The apartment is comfortable (although a fan in summer would be nice, it can get quite hot at night!) and it is quite spacious considering it is inside an attic. Inside the apartment there is everything you need for a pleasant stay.
Sven is a wonderful host, he was easy to communicate with and made check-in very easy. He gave us some good tips about the area and things to do while we were in Lisbon. We would definitely recommend this place, and would stay here again in future!