I stayed in Ruth's apartment with my wife and my son (4 years old) for 4 nights.
The apartment is well located, close to Marques the Pombal metro station and a lot of shops and restaurants. At the same it is very quiet.
The apartment is well furnished and equipped with everything you need.
Ruth is very kind.
There are not wall heaters, however Ruth provides you with electric heaters almost in every room.
Definitely highly recommended even for family with children.