Perfect little studio apartment right on the 28 tram route. Instead of waiting in line in Rossio Sq, just take a nice walk to the end of the tram line and jump in for the trip back into the city centre. Location also easily walkable from the centre, Barrio Alto and the old town. Zero to complain about here.
There are a few fairly steep flights of stairs to navigate up to the apartment so that would be the only downside of this is any issue to you.