I love these little tags.  I purchased them to include one on my keychain and fit the other two inside the plastic sleeve of my luggage tag.  Setting it up/activating the tag was incredibly simple.  My only complaint was that when you set it up you need to enter a label description of whatever item you have this attached to.  In my case I am using this on 3 items.  Since the QR code is the same, if someone scans it on my keys and sees the description, they'll see it as "luggage" since that's what I entered.  I guess it seems a little silly to have the exact same code on each one of these.  I knew they were like that reading the product description, but didn't realize you label the item they're on.

All in all, I think they're neat & convenient.  I doubt they'll be used but in the off chance they are scanned, it's nice to know they're there.