Great appartment in a very convenient location - close to Friedrichstraße station and just across the street from Boros Bunker (if you want to visit it, book 3 months in advance!). Very bright, clean and spacious flat. Maria was very nice and allowed us to check-in after 11pm as we landed late in Berlin. One of her friends took care of the check-in and was not very friendly on the phone but everything went well when we arrived at the flat. Overall very happy with our stay in Berlin! Thanks Maria :)