Frank's apartment is in an amazing location in the middle of Berlin Mitte with bars and cafes only a short walk away.
The apartment itself is so cool - a really big open plan kitchen/dining area/living space with bookshelves and a comfy sofa. Such a great space for relaxing and unwinding after a long day/night exploring the city. We especially loved the enormous bathroom.
All-in-all we had a great trip and loved staying in the flat. Really hope to return in the future.