Had a great stay and the flat is a really good base with plenty of interesting places to visit even if not heading into the city itself. As with other reviews, the quirkiness of the flat should be considered for anyone with a mobility issue as the loft bed whilst comfy may be a problem.
Warm, clean and an array of beverages, Jascha met us and gave plenty of recommendations for food and drink. I will definitely try to book again if heading back to Berlin.