A bit farther away from Berlin center, but close to a lot of other worthwhile places (Spandau, Teufelsee, Grunewald Olympia stadion...) and from Berlin easily accessible by S-bahn to Olympia.
The hotel itself is good quality for your money (we stayed in a large room with kitchen facility), the beds are good, breakfast is available and plentiful and the staff is SUPER friendly and helpful. We had a really great stay there.