Jonatsta:
VOTED COLD. Stay away from this product. These set my Grandma's hair on fire when she wanted to do away with her perm.
Could have been something to do with the chemicals they use for perms? They're probably flammable.
I've used them for 6 years, have carelessly burnt my face/ear/forehead many times but never set my hair on fire. And they get my hair perfectly straight in no time at all!