We had a great stay at Susana's place, and would definitely recommend it. Lisbon is a great city, and her apartment was an excellent place to stay while we discovered it.
The flat: Susana's apartment had everything we needed. It was clean, stylish, well equipped and comfortable. The bedroom was quiet at night and the flat overall was a good temperature (which is impressive as Lisbon was very hot when we visited in July). There was plenty of space for the two of us. Overall the apartment had everything we needed.
Location: The apartment is in a great location. Chiado and the Bairro Alto are in easy reach and have a range of great shops, restaurants and bars. Cais de Sodré station is also a short walk if you need to get the train to Belem (or further afield to Sintra or the beaches towards Cascais). Tram and metro stops are also nearby if you need them, but the flat is so central we walked to most places. It was definitely a great base from which to explore Lisbon.
Host: Susana was a great host. Although we didn't get to meet her, she was communicative and helpful before and during our stay; she even sent us a helpful video message showing how to get to the flat from the metro. She'd also left a folder of useful info about Lisbon, with good restaurant and activity tips. We felt welcome and well supported both before and during our stay.
Overall, we had no complaints at all and had a fantastic stay. Obrigado!