Tiago is incredibly friendly and helpful, way beyond what was needed. The place is in a great location in the Chiado neighborhood. It is very clean and was ideal for my short stay in Lisbon.
Note: it is a 5th-floor walk-up, so make sure you are ready for the stairs when you come home. Also, the shower has a low-ish ceiling (about 1.85m) so it may be uncomfortable if you are tall.
I would definitely recommend Tiago's place if you want great value for money in the busy Chiado area of Lisbon!