Received mine in the mail this week. This is strictly an emergency pen. It's far too small—really—for everyday use. And I'm not so happy with the proprietary refill. Having said that, it does seem to be very well constructed, but to be honest, there is not that much to it. And it does not detach from the keyring. You'll need some sort of quick release set up for that. but I wouldn't recommend spending any money for that. This is strictly an emergency pen. It's fine for what it is. Definitely not an EDC item.