This was my first Hostel style airbnb experience, if you expect it to be that way, you wont be surprised. But it was of course different to have a shared bathroom, multiple guests staying in the same place, and having to share all things; kitchen, common area, etc. My experience was fine. They seem to be operating very legitimately (first airbnb to collect city taxes from me). All in all, for the value was a good experience. I'll probably stay there again if I need to keep my costs down while in Berlin.