João Paulo's apartment is in a terrific location (as also confirmed by my local friends who dropped me off there later), just a stone's throw away to the winding streets of Alfama on one side and the Praça do Commércio on the other. I was only there for 2 nights for work so I did not get to do much sight-seeing, but the access to transportation, be it the Baixa-Chiado metro or the buses and elétricos (trams) was great. I did not get to meet João Paulo in person as he was out of town, but he responded promptly to queries I had about transportation, etc. The apartment is on the top floor--5th floor for those of us residing in the US--and there is no elevator, so if you have a lot of luggage, a stroller, or knee problems it might be a little hard to access. But the top floor means beautiful views of the Sé Catheral and the Tejo beyond, or of Castelo. His apartment is also thoughtfully furnished, not the monotony of Ikea that we tend to see in many Air Bnbs, so there is more character to the space also. There is a supermarket nearby and apparently an elevator inside takes you near the Castelo for free.