IMHO, Tanita's are crap for testing bodyfat. They're good weight-scales, but ignore the other part. Get some good calipers and learn how to use them - more important than trying to figure out your % bodyfat from them is simply tracking the skinfold measurements.

Personally, I don't much understand the obsession some folks have with % bodyfat - the bottom like is you look and feel good, or you don't.

Track measurements, take pictures, and pay attention to how you feel and your performance at the gym.