The apartment was great, just like the photos, well equipped, comfortable, modern, spacious and very clean. There are shutters on the windows so it's nice and dark at night to sleep. Plenty of hot water. Was February so we used the air conditioning as heaters and were never cold. Beds are comfy. We were a family of three and had a two year old with us. The steep stairs did not bother us.
The host Floride was very responsive, professional and easy to communicate with.
Location is great if you want to be out of Lisbon city centre but still close to it. Belém is a busy neighbourhood of Lisbon. Lots of restaurants, open parkland, the river and the touristic attractions such as pastéis de natas. It is easy to walk to the train, bus or tram.
20 to 30 minutes in taxi to/from the airport depending on traffic. There's a Pingo Doce supermarket about 5 mins walk from the apartment which sells good quality food.
We really liked this apartment and would stay again. We definitely recommend it.