Four stars, not because of the bathrooms or friendly reception, but because it's the perfect base for exploring Berlin by bike. Online booking was no longer possible (and we couldn't reach them by phone), but we managed to secure a spot around 11:00 AM. Payment in cash: €114 for 3 nights, including electricity, and a €20 deposit for the gate key. Condensation is causing the shower to become wet. The toilet is okay (in a sort of shed).

I looked around and turned back. It was way too hot to be out in the open. The restrooms were in a sort of construction trailer.