My husband and me, we have spent 3 nights at the tiny house and we believe this was one of the most exciting and positive experience we have ever had with renting apartments via Airbnb!
The house is really tiny and located not in typical tourist place but the neighborhood is very friendly (even when we must communicate in Spanish/Portuguese mixture! :)))
It is perfectly renovated and equipped with all needed for the comfort life. The host did a great job! The kitchen contains more useful stuff that average kitchen in "normal-size" apartments. There is a very romantic sleeping place just under the roof with a window there you can see the stars!
We really recommend staying in this house if you want to explore Lisbon and not spent too much money on renting a flat. All the main sightseeings are reachable by foot in about 30-45 minutes. Or altenatively you could use public transport.