Fitbit is one of the most well respected names in the quantified-self space, so we expected a lot of the Fitbit Flex. When we put the device in front of Terrence O'Brien, he found that it wasn't the most feature-packed, or the flashiest, but certainly the most well-rounded device on the market. That was despite the fact that the Nike Fuelband had a better display and the Jawbone Up had a better mobile platform. One of the reasons, of course, that the Flex won out was its cheaper price, and you can rarely argue with that. What we'd like you all to do this week is to sign up to our product forums and discuss what, if Fitbit came knocking on your door, you'd change.