Luis' place was great. Our favorite thing about it was it's central location on a lovely little side street in a wonderful neighborhood in Lisbon, close to many restaurants, nightlife, and sights. For example, we didn't have to walk more than a few feet to a delicious restaurant across the street from the apartment for dinner.
The apartment itself was very clean and newly renovated, equip with modern appliances, including a washing machine, cooking/cleaning supplies, and got nice light/air from french windows that open out towards the street. My only complaint was that the apartment was not as well decorated/homey as the pictures made it look, and that the bedroom is quite small and has no windows. However, it was a perfectly nice place to stay for the short time that we were there.
Although we never met Luis, he made himself available to us in case we needed him and was flexible with our check in time.