When staying in Berlin, I believe the most important criteria to look at, is how close are you to a U-Bahn or S-Bahn stop. The reason I choose Ben's place was due to it's location next to a S-Bahn, and here you are at Friedrichstraße in under 10 minutes. From there, anywhere you need to get to in Berlin is easy. The neighborhood also has a grocery store, kebap stands, and a Backerei all within a few minutes of walking. The only odd thing is you have to walk through a 1-bed bedroom to get to the 2-bed bedroom, which limits privacy a bit. All in all, a good value for a large group in Berlin.