If you want to use it for the actual body fat calculator (which I'm sure you do) you'll need to make sure you are barefoot to get a proper reading. It gives you a pretty robust amount of information including body fat, BMI, muscle mass, etc. The other great thing is that it can be incorporated directly into the native Health app on your iDevice. I also love how it has the ability to graph and list your progress over periods of time so you can keep better track of your results.
Overall, this is a really nice scale that has definitely done everything I've been looking for. It's sleek, has a great display, and has an awesome app that provides some really good information.
Although I received this product in exchange for an honest review, all opinions expressed are my own and reflect my personal experience with this product. Feel free to ask me questions about this review and I'll respond within 24 hours.
Find it here: http://goo.gl/E1yaH1