We stayed in the appartment with our two kids (3 and 5 years) for 6 nights.
We really liked that the appartment was very spatious and had a huge private terrace and two small balconies. It had all the necesities for a family stay, such as tv's with Netflex, kitchen equipment, coffee maker (nes cafe capsules) and a fridge - the only thing we were missing was a freezer for ice cream and ice cubes.
The location is perfect for going out - there are a lot of great cafes, restaurants and bars in the area. The downside was that the street was very busy and lound friday and saturday night and the bedrooms are facing the street.
The old center, metro stations ect. are within walking distance.