We loved this apartment, the location is very convenient, just on the edge of Alfama, so you can walk right into the beautiful older part of town, but without being right in the middle of the super touristy streets (and more importantly when arriving or leaving, it's located on a street where it is easy to park and unload luggage from a car, something not obvious in a lot of smaller Alfama streets!) The apartment itself is very nice, the outdoor terrace is very enjoyable for breakfast and dinners, and the bathroom is brand new and modern.
Our hosts were super helpful and responsive, and have a very thorough and useful guest guide book to local spots from restaurants, to transportation, museums, etc.. The only minor thing to watch out for is for guests 6" and taller the door frames to the bedroom and bathrooms are short and easy to bump your head into.
Overall this is a perfect place to rent for a family to visit Lisbon, highly recommended!