Pros:
Excellent location with countless restaurants and bars in the vicinity. This is a good, reasonably priced, centrally located base from which to explore the neighbourhoods of Lisbon. Check-in was a breeze, and although I did not meet Antonio, his very kind sister met and welcomed me :)
Cons:
It is an older apartment, and its age is showing. Because it is so centrally located, the noise of the nightlife may be bothersome (it did not bother me at all, just a warning to those who are sensitive to noise).