The stay was in 1 word: amazing!
It's a beautiful house, really close to -literally- everywhere in Lisbon. The place is tidy, fully equipped and even has a big terrace and a (bubble)bath. We arrived late (about 19:30). This was no problem, we even got a tour of the place with some great recommendations of places to visit. The communication with Luis (host) was also great, he contacted us on time with a lot of useful information (he even send us a 8-page document full of tips and recommendations). Furthermore he was always happy and fast to help through chat (also in the evening) and I got his telephone number if I needed anything.
The house itself is quiet, with good insulation from the bars in the street. You can hear some noises from the upstairs neighbours, but nothing serious.
If you like a bit of nightlife: there are bars pretty close.
If you like culture: churches, cathedrals, squares and trams are at walking distance.
To conclude: Great place, would stay here again.