I had a very pleasant time at Giulia's and Martino's place!
The apartment is great and stylishly decorated; you have a wonderful view on Prenzlauer Berg; there are loads of cafés, bars, and restaurants nearby - and it is easy to explore all of Berlin from that place.
Both Giulia and Martino are lovely hosts, open-minded and caring. They help out, whenever you need something.
Definitely recommended !!!