This is the best fitness gadget I've ever purchased. The price is reasonable and the warranty is great. Tanita is a company who supplies many health clubs and professional athletes with their scales because they are the best. This specific model will record up to 4 people daily. You start by entering statistics which the scale remembers such as age, height, activity level, etc. Next when you weight yourself you are given:

Weight
Body Fat Percentage
Body Water Percentage
Muscle Mass in Pounds
Bone Mass
Metabolic Age
How many calories you need to eat to maintain your current weight

It's amazing because you can tweak your workout if you happen to be losing muscle instead of fat. You can keep an eye on your bone health and hydration as well as your metabolism. It's a great tool, the best thing I've found to really progress my weightloss. A regular scale just cannot compete even slightly. And, it's modernly stylish as well in rounded clear glass.