The location is excellent, walking distance to all the places we wanted to visit in the historic downtown centre and very close to the Metro as well. Diogo greeted us, explained everything in the apartment and took the time to give his recommendations for attractions and restaurants. He also took a walk with us through the neighbourhood to help us find our bearings. During our stay, Diogo responded to emails within minutes and checked in with us to make sure we were happy with the apartment.
The apartment itself is clean and newly renovated, with its own private terrace, which we enjoyed in the evenings. All the facilities are modern (in fact they looked brand new) and the bathroom is very clean. The only issue we had was from upstairs neighbours, whose footsteps we could hear at night, we mentioned this to Diogo and he is looking into this.
Overall we would highly recommend Diogo as a host and his apartment as an excellent choice to stay in the heart of Lisbon.