I can only recommend this appartment to all people who want to stay cheap in the center of the center of Lissabon. It is a great and clean appartment and if you would like to make breakfast or cook by yourself (which is not necessary in Lissabon ;-) ) there is every kitchen utensil which could be helpful.
Also the contact was very nice with Goncalo, he is a great guy. So to keep it short, all in all it was a 1* because of perfectness.