My friend and I spent 4 days in Lisboa. The flat was super well-located, in Bairro Alto's wich is a great neighborhood with many bars but the flat's street is totally quiet ans we slept very well. The only negative thing we could say is that the apartment was a bit dark and the bathroom a bit small, but it was not an issue at all.
We were welcomed by Prima's sister, Conchita, she was so nice, and she even invited us to the family's bar where she offered us some drinks.
We advise you to go to the Noobai and to the Parking's rooftop which are 3 and 5 minutes away from the apartment. There is also a very tiny restaurant just next to the apartment, it is closed at least on sunday and monday, so don't do the same mistake as us : find a moment to go there !
We definitely recommand Lisbon and Prima's flat and would love to go there again.
Thanks again to you, Conchita :)