I've had both the dog tag and the ankle one.

The dog tag's drawback is that the chain isn't long enough to put it on after you've put your helmet on. You have to take your helmet off, put the dog tag on, and put your helmet back on. That made it kind of a pain.

My husband's phone number changed, so I got a new one - I went for the ankle one this time.

I prefer it. By a lot. Once you have it on you do not feel it AT ALL. Very comfortable. It has a reflective stripe all the way around it, too. Good for moving parts like feet in low light.

I choose the non-interactive one. I want people to get what they need right that minute from the tag, becuase some times there is no time or ability to call a number or log onto a computer to get the info.

The tag easily fit my name, my birth year, NKA (No Known Allergies), My Insurance ID# and Grp #, my husband's name and phone number.

I even had one extra line, so I added "Save the bike, too!"