We really enjoyed our stay at Herbertos Airbnb.
The flat was perfectly clean. The interior was new and had everything one could possibly desire.
The bath was almost new and thanks to the flat being a "tube" you could have a good air circulation so that it wasnt that hot during night time.
The apartment is on the 2nd floor and the steps are fairly steep.
We did the most German thing ever and arrived a little early. Herberto handled that situation perfectly, let us put our luggage in the apartment and even took his time to give us some detailed information about the city and some recommendations.
Summing it all up: Most definately recommendable for a trip to Lisbon!