We have stayed in this amazing apartment for more then month and we would really recommend it for the long stay if want to combine work and enjoying Lisbon vibes.
It has everything you need for comfort stay and even more!
Kitchen is well equipped, a lot of space to store your thing and there is a comfortable place to work from home.
The neighbourhood is quiet without crowds of tourists outside on this street. But it has very good location to walk by food to the city centre and restaurants are pretty close.
As for me I specially enjoyed the balconies and the view (apartment has two balconies!), that is very rare and made me feel like at home even more.