We stayed here for 3 nights in April 2013.
This hotel is quite close to the metro station with an easy walk to the television tower (12 min). Here you can catch bus 100 and 200 to our around Berlin.
We booked a triple room and got the ground floor apartment. Our room had separate kitchen with a large bedroom and a small bathroom.
The apartment is quite modern, although our heater is only mild. It is just enough to keep us warm during April night.