This one is made by Hot Tools and I have to say that it is pretty great! I got it for free on Amazon using my swagbucks. The price on amazon for it is $46.00. If you use a curling iron frequently, I think its worth it. I probably wouldn't have tried it if I didn't get it free, but now having it... I think its worth the price.
anyways, here's a little blurby video about it. basically everything I just typed! haha~
hope you have a good week.