Lovely flat and lovely host - we had no problems during the trip. The flat is perfectly in the centre of the city just down the Castle of Jeorge. It's near all the museums in the city and next to Praça do comercio. The flat is NOT small as everyone said, perfect for 2 guests. The Wi-Fi station has also a little device you can bring around the city to have always your Wi-Fi connection. We didn't meet William but we were received by Antonio. He is a true interesting person, so kind - he gave us lot of advices for our trip and he let us keep a map full of information bout the city.
Thank you Antonio, our visit was perfect!
Planning to come again to Lisbon!
Much love.