We stayed here for 4 nights in May and thoroughly enjoyed our stay. Our hosts, Nicolas & Maria were great with their communication from booking to check out. Check in and check out was a breeze. The apartment is clean, well maintained and has fantastic views from the Balcony. There was a welcome bottle of wine on the table on our arrival which we enjoyed on the balcony on our first evening :). Thank you guys :) The Apartment is on the 4th Flr (3rd Flr Europe). So just be slightly aware of this. Bring your walking shoes and enjoy walking through the streets of Lisbon and remember it is also called the city of the 7 Hills for a reason!! Location wise it is nicely situated equi distance (10 min walk) from Rossio Sq (Sintra train station) and Martim Moniz plaza Tram 28 start. Nicolas and Maria are very responsive so don't hesitate to reach out to them if you need information.
Note on Tram 28, if the line is long grab Tram 12E it brings you to Alfama area and St Georges Castle as well!!
In regards to the current Covid situation there is a SYNLAB location about 15 mins walk from the apartment and from there you can take the metro into town. They don't take walk ins but booking was easy and appointment was fast.
Enjoy!!