The Fitbit Flex is an activity tracker aimed at measuring your exercise, diet and sleep.
The device was my constant companion for about a week, and by the end of it, I felt informed about my activity levels and was motivated to get moving.
While the Fitbit has some frustrating features, it's also simple, comfortable and useful, and I found myself surprisingly addicted to checking my progress. Here's a breakdown of how it did in several areas:
