Annika's place is in a great location for exploring Berlin and is on the S9 train link direct from the Schonfeld Airport and then a ten minute walk from Bellevue station. It was lovely and quiet in the building, with a little city traffic noise when window was open but you are up on the eighth floor and it was good to sit outside on the balcony with great views.
Excellent communication and help from Annika and her friend Johannes, who even stayed up to welcome us at 10pm due to our late flight. Plenty of space, given that it is open plan, and all you need to do your own cooking. Highly recommend!