I stayed at Thais' place for a few days only, but had the most wonderful time. The room is quite cosy but I really didn't need more than that for the 3-4 days I was there. The location is perfect - just a 2 minute walk from praça do Marquês de Pombal, 3-4 mins away from the closest supermarket (there are closer convenience stores), and it takes about 15-20 mins by foot to get to the city center (the whole area of Baixa and Chiado), while walking on the beautiful Avenida da Liberdade.
The apartment itself is very stylish and has a really good vibe to it. Thais went away traveling on my second there, but she was so welcoming and made me feel at home. Highly recommended for a short solo-trip.
Muito obrigada Thais!