Great apartment with excellent views of the Castle. Central location with great public transit links (Tram 28 and subway are minutes from the apartment) which if you like walking, you won't need.
We took a taxi from the airport (13 Euro) and were met by Liam at the apartment. Communication was fantastic with responses within minutes of our questions.
The apartment and beds are comfortable (we were a party of 3) and the heating/air conditioning worked well (we were their over Christmas so actually only used the heating). The bathroom is clean and modern.
No complaints, we'd recommend it highly and will book again if we're back in Lisbon.