Wow! Jana's apartment is great :)
I visit Friedrichshain regularly and I have seen many places. Jana's apartment is great. It is bigger in real life than it looks in the pictures. The mattress is a good memory foam mattress and offers a great sleep after a long day travelling. The washing machine in the bathroom is fantastic. It means you can "pack light" and perform 1 wash during your visit.
The kitchen is modern and clean with a great oven + dishwasher + fridge (and freezer)!
At nighttime it is quiet and peaceful and a very safe area.
Thanks :)