We stayed in the separate apartment block, down the road from the main reception on Bundesallee 203. The location is good as the nearest U-Bahn station is just 200m away, and there are 3 supermarkets right next door.
The apartment was spacious with 2 double bedrooms, a good sized bathroom, open plan living room / dining area, and well equipped kitchen. One of the sofas could be made into a third double bed if needed.
There was a good quality TV with lots of German satellite / cable channels. However, we could only find one English language channel that worked, which was a little disappointing.
Lastly, please note that as of Oct18, the space the rear of the building (which our apartment faced) is a massive building site. This didn’t bother us as we were out all day. But the noise might bother some if you are planning on staying in during the daytime.