The apartment is good, really good value. We booked a single room w/o breakfast for 3 days. A small kitchen (no Oven, only microwave), fridge and utensils are provided. We carry our child's Pack n Play hence we didn't need the baby cot, but otherwise it is available for 5 euro / day. Room was big enough to place the pack n play alongwith our bed. Rooms were also very clean.
The best part was Bus 112 from Hauptbahnhof brings you directly in front of hotel.
So you pay less on hotel bills & can still reach Hauptbahnhof with ease & enjoy the vacation :)