Everything. It was a perfect. The location was amazing. Few minutes up the hill and you can see the amazing views of Alfama and the river. You can sit on the bench and watch the sub rise and set. You can take the tram 28 and go back into the city through the beautiful hilly lanes.
The apartment itself was fully equiped. The kitchen was fully functioning, wifi was great, the bed was plenty for 2 people. The great thing was you can have a complete blackout even with light outside. This was great because it meant I could sleep-in.
Lastly, but not the least, Pedro is a fabulous host. He picked me up from the airport, showed me the focal point if I ever forgot where the apartment was, showed me around the apartment and made me feel at ease from the moment I met him.
When I return to Lisbon, Pedro, I know where my room will be. :)