Overall it was a good experience. As we were new to Berlin, we found the place very pleasant and have access to 3 major super markets. The communication could have been better like getting WBS, letter box key and dustbin instructions was very slow. And also didn't know about the deposit for letter box which added additional delay.
And if you are locked outside the room with motor error, you have to remove the battery and insert them back. If it is late in the night and didn't get response, you are all stuck.
It had all the amenities required from kitchen to television, wifi etc.
Would like to give 5 star if they improve on communication.