I couldn't recommend Tiago as a host or the apartment itself enough. Tiago's communication was excellent from the start and he provides a really personal touch in welcoming you to Lisbon with recommendations, travel advice and being there to show you around the apartment when you arrive.
The flat itself is fantastic and had evidently been thoroughly cleaned before our arrival. The location couldn't be better and you are within a 15 minute walk to everywhere that doesn't require public transport. The views from the flat are also spectacular and you are right in the middle of everything, but with the necessary quietness to get a good night's sleep.
Fully recommended!