tanita scale?

Does anyone use a tanita scale? How accurate are they?

I got one, set up my person profile, age, female, height then it weighs me and gives me my total weight, fat weight, % body fat, % water, % bone, BMI.
its only a small strip, so i cant get my whole foot on it..so what part of my foot should i put on the strip or does it not matter?

Its a weight waters scale. not too expensive so wondering how accurate these things are?