I greatly enjoyed my stay at Elsas apartment.
The apartment is in a great location in a small street in Alfama , has the perfect size for a single person or a couple, is well-equipped (good Wifi, nice amenities, lots of Tourist material for Lisbon) and is in general quite nice.
The hosts are wonderfully kind, helpful and supportive. They took me on a smaller tour of the city, showed me the parliament and even offered to drive me to my COVID-19 test. The communication was easy-flowing and very friendly. I further also got some great advice on places to visit.
I can definitely recommend staying at the apartment.