How accurate is this machine in terms of measuring body fat?

Question

http://www.amazon.com/Tanita-BF680W-Scale-Monitor-Athletic/dp/B0009V1YPU/ref=pd_bbs_sr_2?ie=UTF8&s=home-garden&qid=1219771460&sr=8-2

everytime i step on this machine it says i am either 22-24 %body fat and when i eat something it says i am 26% bf.

Here are my current stats

Weight 177lbs

Height 5.7 ft

Waist 31.8

Chest 40.5

Neck 14.8

Is there a machine that is accurate that i can buy to measure my body fat.

Answer 1

how old are you and can i see a pic

Answer 2

This is very useful

http://www.gain-weight-muscle-fast.com/b...