Last year, the Fitbit One was our favorite fitness tracker. It had a great design, solid accuracy for steps and floors climbed, and a nice screen. The only problem was that it was so easy to accidentally leave in a pair of pants. To combat this, the company created the Fitbit Flex, its first wrist-worn product. Unfortunately, while aping the Nike Fuelband, Fitbit accidentally threw out everything that made the One so great.