The apartment itself was great. This was our first trip since COVID started so it was reassuring that the place was clean and comfortable. We were there in January (one of the coldest months in Lisbon) so on a few nights the portable heater was a really nice amenity, but usually we found the place to be warm and cozy without it. The space is perfect for two and well-furnished to make one feel at home. The bed was incredibly comfortable and the duvet was extremely warm, which was great for the lower nighttime temps. Joao and Silvia had equipped the home with all the kitchen and cleaning basics that we would need for our stay. The washer that is listed as one of the amenities is actually a 2-in-1 and functions as a dryer (takes awhile to fully dry, but you can partially dry in machine prior to hanging). The complimentary wine and ginja were nice touches upon arrival.
Joao and Silvia were great hosts and always quick to respond. They were very thorough and clear with all instructions.
As for the location, it got a bit busy during the days with all the tourists (I'm sure it would've been busier if not for COVID), but at night the neighborhood was quiet and we felt completely safe. However, please BE FULLY AWARE that many of the reviews mention the hilliness for a reason. We enjoyed the space itself, but we wish we would have known how steep and tough the hill up to the castle was. It was a real pain to make the hike back home at the end of a long day filled with exploration and walking around other parts of Lisbon. The 737 bus has a stop right outside the castle wall that will take you to Figueira, but we found that it stopped running around 8-9pm so it wasn't so helpful if you have dinner out as many restaurants start to open around 7:30 pm. There are 2 trams a few minutes walk further down the hill, but we found them to be a bit unreliable especially at night (may have been COVID related schedule issues).
Upon departure, we took an Uber to the airport (it was a quick ride) and it only cost about 6-7 EUR. That said, Uber and Bolt are not allowed beyond the castle wall and can only come up right by the bus stop.
Tip: We got the Viva Viagem transit card and loaded it with zapping without understanding that transfers are only free if you stay within one transit network. Carris (buses & trams) is different from the Metro (subway) and the suburban trains. Keep that in mind when deciding between zapping, single trips and day passes.