Maria's place is in walkable distance from the train station (keep in mind that Lisbon metropolitan area has 3 mio. people, so one needs to walk a little, or take a taxi/Uber), from a beach and some grocery stores and pastelarias (bakeries).
The house has character and furniture that a collector would die for (probably a century old), one can imagine the stories those could tell.
The room was nice and clean, with access to a balcony, the bedsheets had even been ironed by the lovely house keeper.
Keeping in mind that one is not really in Lisbon and getting downtown takes a while, I'd recommend this Airbnb as a good cost/benefit place.