We had a perfect stay with our kids (7 & 9 years) in Lisboa. The apartment is very well located and there are a lot of cafes, restaurants and nice shops nearby. The next supermarket is only 50 m away, definitely a plus when traveling with children.
We recommend to reserve a table in the restaurant in the building (O Velho Eurico) in advance via mail - we were not able to get a table within our stay.