Kelpermaid,
Bioelectrical impedence is one of the least accurate ways of measuring body fat. I did not see the Consumer Reports article to see where Damselfish got her info on consistency, but part of the problem is that impedence measurements are affected by your hydration level, amount of food in your digestive system, even your body temp.
For kicks one day, I measured myself throughout the day using one at a gym I work out of. Its results varied from 10-15% body fat. Keep in mind that that 5% swing in results is actually a 50% difference in total body fat.
I'm with CBulla 100% on this, even when it comes to weight. Focusing on scale weights can be motivating part of the time, but sometimes people get discouraged by increases or plateaus when they don't need to. I think, in the long run, it is better to judge results based upon how clothes fit, how you look in the mirror, and of course, how good you feel in general.
Cameron