Luis's place is in an excellent location, right next to the Santa Catarina lookout, with an excellent selection of eating and drinking very close. 3 minutes walk to Barrio Alto, 10 minutes walk to Cais do Sodre and Principe Real.
The apartment itself is small but nice, and everything was in place when I came, from the classic bottle of "welcome wine" (and fresh bread for the next morning), reliable wifi, capsules for the coffee maker and guides and maps of the city.
All in all, I had three wonderful weeks in Lisbon, and Luis's place was a great place to start the exploration.