I bought this scale at Target a couple of years ago and it's been a work-horse for me ever since! It's extremely accurate, I've measured my body fat on this scale then had my body fat measured the same day by a professional, two different ways, and the scale was within 0.1 percent accuracy. We have had no problem setting up multiple people on the scale. It starts behaving a bit funky when the battery starts to go, but that's easy maintenance.
I've used this scale for a couple of months and love it. I use my scale every day to measure my weight loss. As long as the scale is placed on a flat surface (For example I'm using mine on a concrete surface) you will get accurate results. Placing it on carpet will give you an inaccurate reading from my experience. The scale is generally accurate within half a pound. Make sure your feet are somewhat damp when using the body fat portion of the scale. My body fat has gone from 37 to 31% in the course of dieting. Make sure it is set to your specific gender (Male/Female)