Joana's place was perfect. I didn't realise just how central and convenient the location was until we'd spent a day looking around. Trams are in the square right outside, or in the next one over (other lines), the metro is also readily accessible from here, and Rossio station (where you can get the train to Sintra) is just a short stroll away. You can get groceries and prepared food in the square below. The entral district of Lisbon and many of the main sites to see are also just a short walk away.
The apartment was lovely - a beautiful, comfortable feel, and with its own character. We appreciated the little gifts Joana left out for us very much:-).
Joana clearly states that the apartment is on the 4th floor with no elevator. Keep that in mind when you pack your bags - that's a lot of stairs! But the effort is well worth it.