Martina and Charlottes place is amazing! Beautiful building-even the corridor is well decorated, great location (bars and cafes on your doorstep) and easy access to all the must see sites! We hired bikes from the shop Martina recommended which was lots of fun! And Martina and Charlotte were really helpful, letting us store our bags there after check out and being available if we ever needed them. Would definitely stay here again if I go back to Berlin!