This apartment is very good for small groups of people who are looking for a place within easy reach of the main areas. You can walk to the central part at the main station in about 35 mins and get the bus tours, or wander about the main shopping area of Friedrichstrasse or get the underground and be there in 10 mins. It took us a while to figure out the transport maps as they are massive but once we had it, found our way to and from the apartment quite easily.
It is in an ok area, on arrival we weren't sure about the area but it was absolutely fine.