You're in direct line of sight to maybe 6 restaurants, the historic tram runs right by the front door, and if you walk a few blocks down hill you can see an amazing view of the river and the terracotta roof tiles of homes on the hill while you drink an aperol spritz. It's great. Lisbon stays open late (and also gets up a bit late), so there can be a bit of road noise from the front or from above in the unit upstairs, but the bedroom is in the back with windows out to a quieter pedestrian-only street, so the noise is manageable.
Carla is a great host -- the internet was down unexpectedly when I arrived (it sounds like someone had given the wrong cord a tug) and Carla quickly came to check it out and get it fixed.
In short, neighborhood is incredible, the apartment is nice, well-outfitted, and clean, and Carla is easy.