Marta's apartment is really stylish and offers great comfort for the shortest and longest stays you may have in mind. The location is very good, close to the centre of the town, and has great transport links to different parts of Lisbon and the airport. The apartment itself is really nicely decorated and (most important part!) has a very comfortable bed. It also has a well fitted kitchen, which means that you can cook your own food if you fancy it (and a great fresh produce market about 10 minutes walk away!).
The only small problem we had was with accessing the apartment on our first night, but Marta was really responsive and immediately helped us with tips on how to address the pesky door (top tip: pull the door towards you when opening the lock, if it's stuck). She was really helpful on messenger throughout our stay and very supportive.
Overall, would definitely recommend Marta's place :)
Thanks,
Marina