Ellena's flat is just as described. It's 5-7 minutes walking distance from U-bahn (U3) and S-bahn.
Communication with her was super easy.
The place has everything one might need - fully equipped kitchen, washing machine etc.
Only 2 disadvantages that could be easily fixed - the restroom could be a bit cleaner and an aroma diffuser might work well. The bed (or rather couch) in one of the bedrooms has an uncomfortable slope towards the floor.
Otherwise, everything was perfect. The flat is spacious, the bathroom as well.