Nuno is a great host! Responds very quickly to messages. Took his time to give me an overview of the city. Shared his restaurant tipps, etc.
The apartment is super clean and comfortable. Hence my 5-star rating!
Two things to mention though:
1. Including all fees I paid about $115 per night. This might be a great deal overall but for one person it feels just a bit high for Lisbon's price standard. For that amount of money you could probably get a hotel.
2. The windows are right underneath the backside of the building. And there are two giant AC compressors that make a ton of noise. Which means you need to have the windows closed at all times. There is a well functioning AC in the apartment, but you can still hear these compressors go on and off with windows closed... Nothing you can really do about that and the windows are well insolated. You will get used to it after a while.
I would stay here again especially because of its location to everything.