- Durability The hinge seems to be wearing a bit, but over all it seems to still be in good condition. No noticeable wear or tear on the device yet.
- Portability You will forget it's there. Though that can be a problem, if you forget to remove it when you change clothes.
- Ease of use You wear it, and that's it. I'd appreciate it if, after a Tracking session, it would allow me to go over the final numbers, but the website is OK for that.
- Design and form factor Feels like many pants pockets will over-extend the hinge. Can be difficult to put it on wrist band. Does't always feel secure. Belt clip is very uncomfortable.
I've always had a problem with its calibration, however. I don't know whether or not I can trust its estimation that I'm burning around 3,000 calories per day (my job can be fairly physical, so it's not entirely outside the realm of possibility), but I can never get its numbers to jive with GPS tracks or a treadmill, and I've re-calibrated my stride three times (I even did math with Fitbit tracked steps over GPS tracked distance). Still, it seems to be good enough for daily use.
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