I spent 2 weeks here for winter sun in Jan 2023. I was also working part of the time, the internet is fast and fine for video calls etc. It was clean, comfortable, well stocked and I recommend highly for 3 main reasons:
Location - based in the heart of Alfama, with all the local amenities you need. An excellent bakery for bread and of course pastel de nata. Several mini-markets, good restaurants, and also close to the metro, tram 28 and buses to reach the rest of the city. Very close to the Tagus river - amazing sunsets every night. Despite this it was quiet and I slept well in the comfortable bed.
Views - linked to this, the apartment living room has views over the Tagus - what a view to wake up to each morning! There is a small balcony with double doors to appreciate the views even more.
Hosts - Maria João & Filipe could not have been more helpful. They sent very clear instructions, gave local tips on restaurants, fado and were so responsive. Thank you for a great stay in Lisboa!