I was looking for a place to sleep when doing some experiments at Helmholtz Zentrum and for that purpose this place was alright and the location convenient. The bathroom arrangements/rules were slightly inconvenient. The main bathroom is located next to the room but you are not allowed to use the toilet. Instead you need to go downstairs and use a guest toilet. Some of the house rules were a bit odd, e.g. "don't leave bodily fluids in the bed". I was also surprised that the host went inside the room when I was not there, without notifying me. All in all I felt more like a nuisance than a guest.