My five day stay in Ralph's apartment has been a straightforward and relaxed AirBnB experience. The place has typical simple yet functional equipment and furniture you'd expect from an AirBnB.
I slept well enough on the big and clean bed, the mattress is quite comfortable, though it's sitting on a simple wooden panel (no slatted frame). There are a few chairs and Sessel, a garden table, but no working desk (just in case you'd need any). Ralph's place has high ceilings, a nice wooden floor and a selection of books in the one big bedroom.
I missed nothing substantial, all basic equipment and appliances are there, including as dishwasher and a well working washing machine.
The lush, green and quiet inner courtyard was a pleasant oasis amidst the busy surrounding of the apartment, which is the typical Kreuzberg buzz, mixed with a funny spin of Marihuana trade in the Görlitzer Park across the quiet street on the front side.
The location offers a lot of small and delicious eateries, some of which Ralph was helpful to recommend. It's a great basecamp for exploring a the eastern part of the city.