Martin's apartment is even better than you can see in the pictures. As he mentioned, it was initially meant for him to stay there so they have a lot of very cool personal touches and the space is perfect for a group of 3-4 people traveling. It's also perfectly located in the heart of Lisbon, with all key areas & hotspots within walking distance.
Martin (who was there for our checkin) & his colleague Paolo (who managed our checkout) were both very nice & helpful.
Would definitely recommend staying at Martin's place if you plan a trip to Lisbon.