Elke is a pretty nice person. She always tells you the rules of her room straightforword, so you don't have to worry about them after that. You may be surprised at the beginning by the stairs to the 4th floor, but it will probably be good for your health. The location of her apartment is great. There are a lot of good bars and restaurants that you can easily find. I recommend Bräugier BrewPub where is a cool craft beer bar, which is located a just a few minutes walk from the apartment. At the same time, her place is easily accessible to tourist attractions as there are many public transportation options. If you want to enjoy staying like a local in Berlin and sightseeing, I highly recommend her Airbnb!