Apartment is very clean and much bigger than on photos. We were positively surprised when we arrived. Very well equipped and this really important when you are coming with little kids.
Location is really great. There are near by a lot of stores, restaurants, markets, kids playgrounds... U-bahn (U2) station is just around the corner. From there to Postdamer platz 15-20 minutes is needed.
Only negative side I can see is a light in the apartment. As it is in basement you need to switch on light even during a day.
Nicole and her husband are great hosts. They specially for us brought kinder bed.
Next time we are coming to Berlin (hope soon) we will try again to book this apartment.