The apartment is very good, and in a good neighborhood. Some may find it a little noisy due to its being at the intersection of two busy major avenues, but that did not bother us.
There was a bakery-restaurant and a convenience store right across the street, plus two family restaurants. Some 250 yards away (the avenue is on a slight slope at this point) there were a drugstore and a neighborhood supermarket. About 500 yards from the apartment (at the top of the slope) another bakery-restaurant, and the Roma subway station (I did not see elevators or escalators at the entrance the station).
Suggestions:
1) A few days before arrival, be sure to obtain detailed instructions on how to get in the apartment. In our case (likely because of a hospital-related issue) we did not receive the information on which of the six condominium buildings we were going to stay in, nor which apartment, and initially we had no way of getting in touch with the person who was waiting for us. I had find a spot with free Wi-Fi (not plentiful in Lisbon) to call the host via Skype for further instructions.
2) There are two flights of stairs to climb at the entrance of the condo (on the avenue side), but right around the corner (on Rua Francisco Lourenço da Fonseca, on a slope right after the two garage entrances), there is a street-level gate that can be used to easily enter the condo. We did not receive this information beforehand, and due to our slowly advancing age it wasn't fun to haul luggage up those stairs. Lucky you, future guests.
Other than these two initial hang-ups, we enjoyed our stay in the apartment.