Stick with your traditional scale!
As a loyal Fitbit user, I was excited to get the Aria. However, I was very disappointed. Weights can vary by 5 pounds at one time. Despite drastically different height and body fat percentages, it cannot tell the difference between two users who are within 10 pounds of each other. The body fat percentage was 3-5% higher than other devices and traditional caliper readings.  If I still had the box, I'd return it.
Rating: 1 stars