Suelen's apartment in Chiado is beautifully light and airy on a corner in a great location in Chiado. Not right in the thick of things but close enough to access everywhere. The wifi was excellent which was important for us. It was perfect for a couple but it could be a bit cramped for 3 adults.
We took the advice of Suelen to book a driver to meet us on arrival into Lisbon. It was more expensive perhaps than a taxi (30 euros) but well worth it to have a hassle free night time arrival into a new city and the driver was very welcoming and knowledgable.
Be aware that because you are in Chiado it is a noisy apartment, from delivery and garbage trucks to enthusiastic tourists at 3am, all outside your window. That said, I would highly recommend Suelen's place to stay in Lisbon.