The flat is very well located (in the Alfama area, 3 min by foot from the santa apolonia metro station), 10 minutes away from the airport by taxi (10€), with a nice view on the river, very nicely decorated, fully equiped and clean (perfect for a couple in love trip). Gonçalo welcomed us with some "pasteis de nata" and local alcohol (made by his mother-in-law !!!) that we shared together, giving us a lot of advices on what to do in Lisbonne and where to have a lunch.
We highly recommand Gonçalo and his flat, and if we had to come back to Lisbonne, we'll book it again, for sure !