First of all surprised by the speed of delivery, I discovered while unpacking the package scales simple appearance. But do not be fooled by appearances. I had to read in detail the operation of the device on the two small guide and instructions provided with and, let's face it, I was as scared as before the assembly instructions of a library from Ikea. Finally the grip was still less complicated than what I feared. After entering your personal information and made your first weight, your body is scanned, analyzed, and almost scanned. Nothing escapes this very reliable device.