Luis is a very friendly host, who makes you feel comfortable just in the first seconds. He knows very well the city, and it is worth listening his advice how and where to move around. The landscape from the window is truly fantastic, it is what you will really remember from your journey! The apartment is super clean and, despite it is not very big, it has a wonderful, very thoughtful layout. We were four (2 adults, 2 kids), and we felt like there's enough of space for everyone. A real gift is small walkthrough room for luggage and things you always tend to scatter around. The kitchen in really well equipped, and there's even a coffee machine with good coffee. The neighbourhood is a bit lively, and people who'd want to sleep early are recommended to take ear plugs not to hear the vivid talking in the nearest bars (although we never heard loud music like in crazy old quarters of Tarifa, for example, so Lisbon is actually quite bearable).
Luis works and lives just nearby, so your arrival earlier / later is never a problem, it's enough to send him an sms, and he will be there in minutes.
Overall - a wonderful stay and great memories! I wish we stayed there longer!!