Micael & Patricia's apartment is beautifully designed and very well thought out. Even though it's in an old building, the apartment it very modern, with air conditioning, sound-proof window-doors, a lot of sockets and great internet connection. Besides that, its location is great, very close to some of my favorite spots in Lisbon. The locker facility to store luggage after the checkout is also great.
Things to be aware of: even though the internet is great, it's not the best place to work remotely from, as the chairs/stools aren't very comfortable (but there are plenty of cafes nearby). Not very reachable by car, as the streets are very small and usually fully occupied but the local's vehicles.