We enjoyed our stay very much.
The apartment is big, quiet and very beautiful, just as in the pictures. Although various taxi drivers told us the street was a bit unsafe, and it was indeed very busy, we didn't have any issues.
The kitchen has everything you could need to cook, except for basic condiments (salt, pepper, oil), so keep it in mind when buying groceries.
The location is great for exploring Lisbon, as it is close to two metro stations and tram 28.