Rightly said. I have been carrying a Fitbit for about 2-3 years now. Am I wonderfully fit now? Alas, no. Does it help me stay aware that I need to be more active and help me do so? Yep. If I look at the step number and its not close to what I want, then it can be that extra little push to make me go take a walk or something.
To me its worth it for just that.
I found them to be completely unusable. Had to hold my head in a certain position and had to always turn to look at second monitor, could not glance because of the sweet spot thing. Lasted two days, went back and changed to dedicated lenses, happy ever since.
At the corner of 3rd and (if I recall correctly) Mariposa in the parking lot of an abandoned diner, sitting in a rented car writing code that talked to a box on the lamp post through special radios while the homeless ambled along on their business. This went on pretty much every other week for a several months. And this was just at the beginning of when the area was starting to get improved. Fun times.
"but their ID-checking gun seems to default to an unfireable state, which might not always be an attractive feature."
Isn't that the point? So that only the person with the bracelet or whatever can fire the gun? Unattractive feature? Isn't it THE feature?