We would thoroughly recommend this hotel - honestly, it has one of the best locations of any we came across in Lisbon. The rooms are clean and perfectly proportioned for a pleasant stay. Exactly what is portrayed in the publicility on Airbnb.
What's more, staff are very friendly and always happy to answer any questions or give recommendations for places to eat, etc.
All in all, we couldn't fault the service or the experience of staying at Gat Rossio. Such a rare find!