Nice, friendly and service minded hotel near Check Point Charlie. Good value for what we paid. Excellent standard breakfast, cappucinos on asking for the them. Small bar with friendly staff for night cap. Room was tidy, cleaned properly every day and the beds on the "hard" side (used to soft ones).
For us it was the first time in Berlin and the Gap was perfectly situated for getting familiar with central and south central (Potsdamer, Branderburg, Unter der Linden, Alexanderplatz and (with a bit of walk) Kreutzberg) Berlin.
We would choose the Gap next time as well.