I was really intrigued by these when I first saw them, so I tried curling my hair with my Babyliss straighteners and it looked fab.
I thought that these would do an even better job - unfortunately I was wrong

They don't work for me nearly as well as the straighteners did for some reason, the curls fell out quickly as well
These do have very mixed reviews on Amazon and everything, so you may want to look around and have a read
Good price, though - think the cheapest I could find a few months ago was about £37-£40, ended up getting them cheap with a Littlewoods voucher