The apartment is very good located when you want to avoid the noisy center. But is in beautiful Belem 10 min. to Hieronimus Church. You can take tram and you are in 15 min in the center, you can also take the train and you are in beautiful Cascai.
Thera are many nice restaurants and mini market not far away from apartment.
The only thing is that the apartment is not brand new but still nice.
Tiago answered immediately your question and is very helpful.