We very much enjoyed our week at Jessica & Francisco's place. It's a modern and well-equipped apartment with everything you'll need for a comfortable stay. We particularly appreciated the well-equipped kitchen, the washing machine and the piping hot shower. The terrace is nice too but we didn't get to use it as it was a bit chilly during our stay.
The apartment is Alfama which isn't exactly the best neighbourhood. But we felt safe there at all times. Don't let the hills put you off either - that's all part of the Lisbon experience & you can always get an Uber back if your legs are aching!
One thing you need to be aware of is that you'll have to pay a €250 security deposit via credit card when you check in. It's mentioned in the house ruled but is easy to miss! We checked with Airbnb support and apparently this is acceptable.