Although Karsten wasn't able to check my boyfriend and me into the apartment (as he was on holiday), his friend Natalie was so helpful throughout the whole process. We loved that she showed us maps of Berlin so that we could get to know the local area before heading out, and that there was a cupboard full of coffee, tea, wine, and cooking essentials for us to use. The location of the apartment is also perfect; it's about a two to three minute walk from an underground station that goes to all of the main parts of the city, and the area felt very safe and quiet. It's also really evident how much thought Karsten put into the design of the apartment; all of the art books, the platform bed, and the many vintage pieces speak to a love of architecture and design. Keep in mind that the kitchen doesn't have an oven or microwave, meaning you won't really be able to cook unless you only really need the two hot plates, but this wasn't exactly an issue since Berlin is full of amazing night markets and restaurants. All in all, I can't recommend this apartment enough; it felt very homey and wasn't stark or unwelcoming like many hotel rooms.