Okay so first, Farsad knows what's up. He has fantastic recommendations for local eateries and drinks. He is very Berlin-savvy and we had a great stay at his place.
Second, a segment of the Wall of Berlin is literally a 10 minute walk across the river from his place. It's where you can see a lot of the art that's been sprayed on.
Third, you're one transfer from a line that takes you directly to the center of everything.
Fourth, the bed was comfy and we felt very safe/welcome there, which matters most to us. Do yourself a favor and stay here. Farsad is a great guy and is very responsive.