The location of the flat is perfect! Only takes 7-10 minutes to walk to the Time Out Market and the waterfront so very central. The flat, as are most things in Lisbon, is up a hill a bit so be prepared for some hill/stair climbing when walking back to it!
The flat is small, but has everything you need and is perfect for 2 people, we didn't meet Nelson and his family but the checking in and out process was super easy. He also provides tons of information about things to see and the best way of getting around which was great.
Overall it was a great place to stay and I'd definitely recommend it :)
Thanks!