My friend and I stayed there for a week. It was such a nice environment that if we ever come back to Lisbon we would definitely be back to Steph and Dave's!
They are really friendly and ready to help at anytime.
The house as well is really cosy and fully furnished with any necessities.
The location is also great and if like us you have rented a car is close to everything you should visit as well as a wide free parking.
Overall we are really happy and would definitely recommend it!