Hosts were helpful and very responsive to all my questions before and during my stay.
I arrived earlier than the check-in time but was allowed to drop my bags in a locked room next to their office, which was very convenient.
The room was clean and the kitchen was very well-equipped.
Only critique is that the floorboards are slightly creaky, so we heard occasional noises on our last two nights, but other than that, it was silent.
If you're taking the metro to the Airbnb, prepare for a 10-15 min (with suitcases) walk up a hill from the nearest station. The host did instruct us that there is a hill, so we expected it (and Lisbon is pretty steep anyway),
Would recommend and would stay again because it's less than 10 mins from many tourist spots, such as Miradouro das Portas do Sol and Castelo de São Jorge.
Good location - Tram 28 is right outside so can get to the major tourist areas very quickly and easily - within 15 mins.