We just got back from AKL and stayed in the Sunset Savannah on the 3rd floor (Room 3268). This was a great room for viewing the animals...no obstructions - we weren't too high or too low. There were animals out all all times of the night and day. For some reason, not sure why, zebras don't go there, but we saw all the other animals. Giraffes were around around 50% of the time. We didn't feel we really missed out or anything. Great location!
Good luck!