My friends and I had a lovely time at Joana’s chiado apartment. The views from the balcony were wonderful, especially on Nee Year’s Eve. We could see fireworks from all directions.
The apartment itself is in a great location. It can be a bit noisy at night (lots of bars in this area that are open until 2am), but the location is walkable to practically anything. I only used transport to/from the airport.
I will note that the stairs to the 4th floor is a bit of a hike, and no lift, so be prepared and pack accordingly! Personally, i think the view is worth the trek.
Highly recommend!