We stayed at Maria and Pedro's place early July 2018. I was a bit hesitant on booking an airbnb as I was traveling with my brother and parents and for both this was their first experience. That hesitant quickly disappeared once we entered the building, and the two apartments that we book.
My wife and I were traveling with my two kids and parents, and she was concerned about letting our 15 month old craw around on the floor. When we entered the apartment and after seeing how clean it was, the first thing she did was put our daughter on the floor.
Both Maria and Pedro were readily available even helping us book and confirm a driver to Sintra late into the night, I think it was like 1am in the morning. We had an issue with fry pan not working on the induction cooking top and Maria was quick to resolve the issue. The kitchen was fully equipped, which helped a lot since we cooked breakfast every morning. The grocery store was a quick 5 min walk, and we never felt unsafe even when arriving 2am in the morning.
There are a few bars around the apartment and the patrons due get loud, but we found that closing the window shutters helped dissipate the noise. Also note there are a few restaurants nearby that are close proximate to bars and not suitable for families. Unfortunately we learned that the hard way.
Overall, I would definitely stay here again the next time I visit Lisbon.