As my wife wasn't with us in Berlin, and as my son and I are far less concerned about luxury and ability to cook, we chose the place based on proximity to attractions and low cost, over other attributes.
I honestly expected far less than what we've got.
To me the layout of the place resembled army barracks. Each room contained two beds, each with a side table and a set of two lockable cabinets, there was a communal shower room and toilets, there was a well equipped kitchen, kept in reasonable working order and cleanliness by the guests themselves. The facilities were basic, but checked out all the needs. Our room was equipped with a very sturdy, self locking door, ensuring the security of the stuff left behind, the showers and toilets were clean and functional the entry to the floor was by a magnetic key tag, ensuring no access to those who did not have the right to be there. The linen was very clean, the beds very comfortable, the showers powerful and the nose level acceptable.
We had an incident where other guests started blasting music at unacceptable levels, but one email to the hosts fixed the issue immediately and we were later contacted by telephone, asked whether everything was OK, and if there were any other things we needed to be addressed. The cleanliness, the usability of the facilities and the speed of response when an issue arose all provided a solid sense of security. For a low cost option, this was quite exceptional and I would not hesitate to stay there again.