1 year battery? WOW! I have owned a Jawbone UP and nike fuelband before and even though those are nice trackers, the constant recharging you have to do weekly can be a chore. And they normally need charging at the most inconvenient times too. Leave it on the charger for 3 hours or so and I find myself accidentally leaving home with out it. So here comes the vivofit! A year battery life and it also tells you time?!?!? SOLD! The vivofit's size is very similar to the UP and the Fuelband. Its only slightly larger to make room for a screen. I'm a regular watch wearer so the vivofit actually replaced my daily worn watch as well. Before, I would have to sport both the UP band and my watch on the same wrist. I'm very satisfied with what its suppose to do. The app is something that needs a bit more work from the developers. Its not as nice as the UP or Nike's app. The sleep tracking in the app isn't as robust as the UP's. If I could rate just the app on the iphone, I would rate it 2 stars. Another bonus is that you can switch out the band's color to match your mood.

The Garmin Vivofit not only is a watch but it is also a pedometer and tracks my sleep as well as it can also be worn while swimming. So far I've not had to replace the battery either.

It was easy to figure out a preteen is wearing it and it is holding up well which I appreciate. My one criticism is you can't read it in the dark.

Solid product for the money - easy to use app - wish the display was backlit but otherwise great

This product is simple and easy to track your runs or walks just about any exercise and sleep too.