Fitbit

i might get one too!

I don't know how many people actually have one so they can give insight.

I have one, but my insight might be a little bias.

I've had mine for a few months now. It does well with tracking my feet hitting the floor but other things like if you're cycling or whatever doesn't go well. Don't expect it to track when you're doing sit-ups or lifting weights. If you're feet aren't moving in some kind of walking motion then it won't give an accurate calorie burn.

It's more of a glorified pedometer. It'll track the floors climb (hills, stairs, etc.) based on incline, it'll show how many steps you've taken, and it'll track your sleep. Problem is, if you're in the car, it'll usually count your driving as steps taken or floors climbed if going up hills.

I have one, it's just a fancy pedometer.