Ola,
I can only recomend that Appartment, its very clean the owners are super frindly and courteous. Offcourse the guide whose checking you in is a really cool young guy who knows some nice spots and sights in Lissabon. There is alredy coffe inside the Appartment (really cool, cant live without this^^) for the next guys we left some Ice in the frigde (also got some from the guys who stayed there before keep doing this :D) The stairwell is cleaned every day, also the litter Box down stairs.
At all no complains
Happy Jakob