I had the pleasure of staying in Jorge's perfect apartment for four nights, and my only regret was not staying longer! it's a gorgeous space for one or two people, so well-designed and very clean, with everything you might need for a short or long stay (cooking essentials, storage space, even masks and hand sanitiser!). I've been jumping between Airbnbs lately and this is definitely the best place I've stayed in Lisbon.
Located in Alfama, it's just a short walk from the neighbourhood's main sights, including the flea market, as well as Santa Apolina station. It's close to lots of transport or about 20-30 mins walk into the centre along the riverfront. The only con was the neighbours were a little loud at times but this didn't affect my stay (it's an old building so to be expected).
Jorge's communication was amazing, and he made me feel very welcome and able to ask any questions. I felt so at home there, and know anyone staying would be the same!