Review (4/5): These work pretty well
I put these on my pimply teens and they seem to work pretty well. One kid had a pretty big zit on his nose and this drew everything out in a few hours. The pimple didn't disappear; there was still a red spot that needed time to heal. But it did speed up the process. I think the Tea Tree oil made the difference.
They're not exactly invisible, but they're not too noticeable. The guys didn't wear them to school, but they did wear them out of the house a few times and they didn't seem to remember that they were there. They're fairly easy to apply and remove. They were even able to sleep with them on, though they did rub off and stick to the sheets. I do like that there are different sizes.
I wouldn't call this a "miracle", but it worked well enough.