Great flat in a quiet neighbourhood, excellent for travelling with small children as Michael's flat is completely equipped with all you need, from toys to a travel cot, potties and baby bath tubs. My son loved playing with all the fire engines, cash register and toy kitchen, really useful.
The flat is clean and spacious, the kitchen is well equipped and there are shops nearby for buying essentials.
You are a bit separated from Berlin's main attractions but there are very good transport links on your doorstep.
I'd recommend the flat, especially if travelling with young children.