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

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.

Public Comments

1. how old are you and can i see a pic
2. This is very useful http://www.gain-weight-muscle-fast.com/body-fat-percentages.html