Three reasons why you should stay here:

One - great host. She's helpful, accommodating and fun.

Two - very good location. Walking distance (less than 5 mins I'd say) from two stations (or 5 euro taxi ride from Alexanderplatz), which makes for really easy commute wherever you want to go.

Three - nice room. Plenty of space (could easily host 2 or 3 people), clean, quiet and comfortable.

I look forward to staying here next time in Berlin. Thanks!