Lena's apartment is around 30 mins walk from Mitte.
Danziger Stasse is packed full of eating and drinking options with small and bigger grocery stores within 1 minute.
The flat is stylishly decorated and has everything you need while exploring the city.
Wifi would have been a plus for me as I was travelling solo but plenty to keep you occupied in Berlin.
if I ever went back to Berlin I would specifically try and stay here again.