We stayed at Marta's place for 2 nigts, and I have nothing to complain about. The hosts are very friendly and ready to help, the room is well equipped and the vicinity is tranquil and quiet.
The only drawback might be the distance from the city downtown, but if you're ready to spend about half an hour going by bus, by the bank of the magnificent Tejo river, enjoing traditional Portuguese rural landscapes, it's fine. It's also pretty simple to get there by car.
I will definitely be back to Matta's place when I have the chance to do so.