We stayed this October at Chiado Arty Flats in Chiado/Barrio Alto. It is an Apartment/Hotel, with the benefits of a hotel, but a small kitchenette. I loved this place. It has a modern vibe and our room had a lovely outdoor area. The hosts, Tomas and Catarina were so helpful with suggestions to make our trip memorable.
The breakfasts were substantial with pastries, fruit, cheese, eggs, bacon, orange juice, yogurt, cereal, and coffee. Because we had the fridge, we could save part of our breakfast to snack on later in the day. Breakfast is delivered to your room.
The location was ideal for us. We were 6 minutes from the Rossio Train Station, 6 minutes from the Metro, and in a neighborhood with great bars and restaurants. We had a miradouro (viewpoint) a 5 minute walk from the hotel. It was nice at sunset to go, have a nice drink and listen to music, watch families and couples.