The apartment is good enough for groups up to 5 persons. The bathroom is tight, and the shower has those curtains, but it's ok. The bed sheets, mattress and pillows are very very good.
It's far from the city historical center, but close to the Atomium. There is a tram station nearby and some bus stops, but few options of restaurants. It's better if you are driving your own car, like me and my family did. Serife offers a parking lot for an extra amount a day. It's really useful.
We had a nice time there and were treated very well!