We came for a one-night stay to Berlin to see the city and party at night. From the city centre where most attractions and museums are located you have to take the subway to get back to the hotel, but it only takes about 20 minutes. Walking to the hotel from the metro is easy and quick (5-10min).
The reason we chose this hotel was its walking proximity to all major electro clubs in Berlin, first and foremost Berghain. It's literally 4 minutes by foot, RAW, Suicide Circus et. al. perhaps 10 min. When we came back in the morning we got a quick "Doner Kebab" (Turkish sandwich) and went to bed.
Very clean hotel, nice young staff, more than you would expect for this cheap accommodation. We did not try the breakfast (from 7-11am) as we slept in.
I would go back any time.