we're going next week with DD who is 22 months.
We have a wrist one, and I'm bringing because that child can RUN!
I'll be honest, in our area they aren't terribly popular and I had a lot of negative comments when I used one for DS (now 6).
Actually, I took him alone on vacation once, and we called the wrist band style his "vacation bracelet" - he loved wearing it, and we used it till he was 4 because I figured if he was happy to wear it and I felt safer WHY NOT?
I was pleasantly surprised to see how many people at WDW use them.
On the one hand I don't really care what people think if I'm keeping my kids safe, but it's also vacation and I really don't want nasty comments, KWIM.
I say use it if you need it.