We stayed in this wonderful apartment for 40 days and it is just perfect for a family or couples. The apartment was very spacious and beautifully decorated with prints and artwork. It was very clean with a top of the range kitchen, this included a dishwasher, clothes washer, and dryer.
The living areas are huge and the apartment had heating and cooling. We were there in winter and never felt cold. In the main living area, there is a unique architectural feature called the "birdcage". It was one of the first antiseismic design and adds to the appeal of the apartment.
The best part of this apartment is the location. You are central to everything, you have access to two metros, Rossio and Baixa Chiado and the main train station to Sintra is 10 minutes walk. The trams to Balem are another 5 minutes walk away. Plus, there are three supermarkets with 5-10 minutes walk. Both the host and his contact in Lisbon was always available to help out.
I would recommend this place for short and extended stays in Lisbon.