The room is clean. The kitchen often times has still has some dishes that haven't been washed and some cooked food that hasn't been eaten. I don't know if you can qualify that as 'unclean' but it can come across as such.
You could conclude from the description that you would get your own bathroom. That is not the case, however. I thought at the time of check-in that I hadn't paid enough attention, but having just read it again I think it is something that could(/should?) be changed because I think it is easy to get the wrong impression.
Kreuzberg is a very lifely neighborhood. I was offered drugs pretty regularly, but they were easy to brush off and not intimidating.
The place is well-connected to the public transport system.