I was visiting Lisbon for the first time and really didn't know a lot about this city - but I am glad I chose Alfama as the area to stay as you are surrounded by history and restaurants and cafes. It is very charming. Public transport is close by - a few minutes' walk to metro, train, bus and tram .
Also, I was travelling on my own and I felt very secure in this apartment as there is a keypad to enter the building and the apartment, and secure windows and shutters.
The hosts have thought of everything in this apartment - so many wonderful little 'extras' to make life easy. Lots of kitchen utensils and equipment, plus thoughtful touches like a couple of individual wipes to clean your reading / sun glasses, and bandaids/plasters in the bathroom (you'll be walking a LOT in Lisbon!).
Unfortunately I was pickpocketed on my second day - I lost everything (cash, cards, passport etc) and Pedro and Alexandra were incredibly supportive and kind. Within an hour of me messaging them to say what had happened, Pedro was on my doorstep offering assistance.
I highly recommend this apartment, and the hosts, and would happily return - but next time with my husband.