This is a great place to stay in central Lisbon, perfectly located for getting to places, but reasonably quiet (for Lisbon!). Praca da Figuiera is less than five minutes walk away, with trams, metro (Rossio) and buses. There's also a nice, old-fashioned and very local supermarket there. The river is a short stroll away, and there are many restaurants around.
The apartment itself is great for a family with older children. There's a comfortable living room with a TV, two bedrooms, two bathrooms (one with shower, one with bathtub) and a kitchen with dishwasher and washing machine. One side of the apartment has views over the street, the other overlooks an internal courtyard. The courtyard isn't a great view, but you do get daylight into every room. The kitchen is probably well enough equipped for serious cooking, but we mostly ate out or had simple cold food. All rooms have air conditioning, but we barely used it - the rooms are naturally cooler than outside. This is a very old building, well restored. There is a modern , small (two person), lift in the building, which is welcome after a day in the city. Windows are all double glazed.
Check-in and check-out worked flawlessly, and we were given lots of useful hints and tips.
Would I stay here again? Yes.