First of all - better book asap. This is not an opportunity that comes along every day.
In more detail - I spent a month in this room so know it pretty well.
First - the description is absolutely accurate - please read it carefully and assume that is what you're getting.
Let me first deal with a couple of issues that worried me before arriving:
Language - Martin is fluent in 5 languages, so no problems there
Location/Transport. This place is in the country and its a 15 minute walk to the bus stop. Buses are frequent, well-run and cheap and go to Sintra, Cascais and the coast among other places - so no problems getting about. The nearest village is a one mile walk max and there are half a dozen villages within a 2-3 mile walk. The sea is about 3.5 miles away. It's an hour's hike to Monseratt and a bit more to the Capuchin Monastery. Martin will also drive you anywhere you want to go for a modest fee - he loves driving! So don't bother to hire a car.
And stay for more than a couple of days - make it a week or more - there's no shortage of things to see and do in the area.
Buses don't run a lot in the evenings, alas, but there are several decent restaurants in the villages - do take Martin's dining recommendations seriously - he knows the best places offering the best value.
The place is a little ramshackle and eccentric but the room itself is clean, bright, smart and lovingly well-equipped, with a lovely separate shower room and kitchenette area with 2 ring burner (no microwave alas so stove-top cooking only) and fridge. There is plentiful hot water. The terrace outside is substantial, well-equipped and a real suntrap, and you also have your own bit of garden, complete with deckchairs. There is an air gap between the room and the rest of the house, so you really do have your own personal place, more or less.
There are a number of domestic animals but they are all nice-natured, very well cared for and used to visitors so will leave you alone or not as you choose. The cockerel, alas, crows in the middle of the bloody night, or it feels like it, and is a drag, but that's the countryside for you.
This is not the only accommodation at this venue. There is a camper van and a couple more rooms, though these tend to be occupied for weeks or months at a time. Which says it all, really.
Martin and Roberta are lovely, caring people and you really will feel looked after among friends here.
If you're youngish, fit-ish, a bit strapped for cash (none of which I am, as it happens) and looking for something very different - book now! You will have a wonderful time!