Absolutely amazing place to stay, located in a beautiful neighbourhood, close to what's Lisbon's absolute must-see! Staying in this flat was a pleasure - we tried it both as a raiding base and as a living place. Proximity to sightseeing points (and party points as well) and a great public communication made it easy to see and live as much as we wanted. Well equipped kitchen allowed us to save some expences on dinners and breakfasts. Even getting up the 4th floor wasn't that bad. I'd totally recommend this place.
As for Ana and Hugo - they're respectful and open hearted hosts. They gladly share insights and tips on what to see and how to get there. Communication with them is flawless and I wish all hosts on AirBnB were as cool as them!