Gonçalo's place is perfectly located in the heart of Old Town easy walking distance to many attractions and eateries, and a large supermarket (Pingo Doce). The house is well equipped and distinguishes itself from other Airbnb's we've stayed with complete blackout conditions in the bedroom. With the shutters drawn in the living room and the bedroom door shut, the bedroom is completely dark. It's also very quiet in the evenings so you should be able to get a great night's sleep.
Gonçalo was a very gracious host. Our flight was brought forward several hours which meant we weren't able to sleep the night before arriving and we arrived ahead of schedule. He let us check in much earlier than normal which was a huge relief.
Overall, Gonçalo's apartment is a great place to base yourself during your time in Lisbon.