We had a good time in Lisbon and the Airbnb was a really nice choice due to the following aspects: great location, helpful recommendations, excellent cleanliness, surprises like a bottle of wine or coffee,...
Some drawbacks: we arranged the check in for 3pm and (German/Austrian punctuality ;-) ) had to wait some time before someone showed up after we had called and asked. The bathroom is kinda small for two people but bearable for the short stay. And last but not least, the rent seemed too overpriced to me when you compare it to hotel rates in the area...
However, all in all we can recommend the place and had a good time.