The flat of Diego and Joana is perfect: very well located as it is very close from downtown, very clean, comfortable and large enough for the 8 of us, and on top of that, the view on the river is fantastic, obviously. :-)
Diego and Joana were very helpful before our arrival to give me information on Lisbon. And when Joana welcomed us, she gave us wise and good tips on what to do and where to go. Thanks again! :-)
I definitely recommend their flat for group of friends or family.