We stayed at Babett's place for five nights whilst discovering Berlin for the first time. The apartment is a designer led, easy to get to, clean space in a courtyard which keeps it quiet at night. Beware the very heavy entrance door to the courtyard though!
You will find all you need in the apartment itself and it is close to two U Bahn stations making it easy to use the efficient public transport system to get anywhere you need.
There are a few excellent high end restaurants nearby otherwise it is worth discovering other neighbourhoods for different food and nightlife options as it is a little quiet where the apartment is situated which is no bad thing to come back to when you wish to sleep.
We had an excellent time in Berlin and would love to come back!