The whole stay was just amazing! You are staying right in the middle of the beautiful chaos of Lisboa, more central is not possible. The room doesn't have a window, but you can use a fan (already in the room). Also it is really quiet (which is the disadvantage of being in the City Center, people are celebrating more all less all week until 3/4 in the morning). But I didn't hear anything and it was no problem for me. :-)
The apartamento is cleaned by a really kind and lovely lady everyday, só it is very clean all the time. Also you have everything you Need (kitchen utensílios etc.). But the best Thing For Sure was Gonçalo. He is very kind and attentive, always asked whether everything is fine, answered any kind of question within some minutes and did everything to make the stay as comfortable as possible! Don't think I will ever meet a better host. :-)