Apartment centrally located in Alfama. Has everything you may need, good location, near top of hill. Spent a few days living among the locals with no issues. Safe at night and walking distance to many things to do, eat and drink, markets and tram very close by. As long as you can walk up and down some elevation and stairs you should be fine.
You will to take luggage up narrow stairs, but didnt have any problems.
Would do again..