Kathi is an awesome host..the place is Light, bright and lovely. There's 81 steps to this roomy 1 bedder. The location is handy to prenzlauerberg, and transport is a cinch. On the other hand, you will hear trams, even if the windows are closed. For light sleepers, this may be an issue. Tall peeps may find the bed small as a standard double.
The kitchen and bathroom are excellent, and the clothes washer welcome. No iron if that matters to you.
Its a lovely place to stay.