Great apartment with all you need, the bedroom was comfortable and the mattress and pillows were of good quality. The kitchen had all you needed, although we only made a few basic meals as the local eateries were great value.
Although there is free street parking it is busy in the evening, so having a secure parking place was excellent, and reduced any stress levels when traveling back a few evenings.
The local area itself has a variety of small supermarkets and restaurants within a 5-minute walk, around the corner from the apartment. They are good value, and Gààgle Maps and Trip Advisor were accurate with their ratings.
Belem itself is a nice day out, down to the waterfront. Lisbon central is 20 minutes on the bus from a stop a few minutes away, or by train. Again Gààgle Maps is great, and from personal experience, it is worth getting a day ticket for the bus and trams if you spend the day in Lisbon, the tickets we got were valid from Belem into Lisbon.