We just returned from a lovely stay at Joanne & Ricardo's apartment in Alfama. From check-in to checkout, the whole experience was faultless!
Joanne was there to greet us and show us around the apartment. She had useful reminders/instructions scattered throughout the apartment and lots of thoughtful touches that we found very helpful such as extra converters, maps/guidebooks/information about the area, etc. If we did have extra questions, she answered very quickly, sometimes instantaneously.
The apartment is located in an old building but, once you are inside, you have all the modern conveniences available to you including a comfortable bed, a well-equipped kitchen, a great shower with excellent pressure and lots of hot water as well as space heaters for chilly days.

The location of the apartment is absolutely charming. Every window features an interesting view. There are lots of stairs everywhere though so we would not recommend this area for anyone with mobility issues.