We are so happy we picked this place! It's located in Chiado, old historical part of Lisbon, in a walking distance pretty much to anything. We arrived at 4am, and Antonio was waiting for us, responded quick to our messages and checked us in. Thank you, Antonio!
The apartment has an amazing view from the balcony, well equipped with everything needed, the bed is comfortable and sheets are nice and soft. It's close to a train station where we took a local train to Cascais. The only downpoint for some people could be getting to the apartment. A car can't get right to the door, you'd need to carry your luggage down the stairs and then take it up to the 4th floor. No elevator. However for us it wasn't a problem. Lisbon is full of stairs anyways, we considered it as a good workout :)
We'd definitely recommend this place!