Great flat in a fantastic area. The flat is newly renovated. The windows keep the noise out very well. The beds and other furniture are of high quality. It still has some flaws here and there (missing door handle in bathroom, shower doors not closing properly, etc.). These flaws I would not mention in a normal AirBNB review but at the hefty price tag of 9000€ / month, they lead me to deduct one star. On the other and, it is normaly priced compared to other offerings in Lisbon.
The other star I have deducted because of the rather unfriendly communication with the company that runs the place that we experienced at the end of our stay.