The Concrete sky cabin was the perfect place to be during our stay in Berlin! The great view to east Berlin (& also to the TV tower) , the minimal/industrial design, the super central location & neighborhood of the apartment are some of the reasons to pick this place during your stay at the city!
I would totally recommend it to anyone :) Thank you Steffen!
(A tip only for the party animals: If you return in the morning home you'll be able to enjoy your sleep but fyi the curtains aren't totally "light -proof")