I just bought some a few weeks ago and used them for a Halloween party, and I have to say they work really well! It took a few tries to get them on right, but once I did they lasted all night for me. My friends liked them so much that even they are going to get some, lol.
I'd like to hear other people's stories if they have used them! If you don't know what they are, here is a tutorial. It helped me when I first tried them out.