I've repurchased these once now, and will again in the future. The first time I heard of these I figured they were a gimmick. I finally added them to an online order I placed to bring me up to free shipping and I'm glad I did. There were some hits and misses at first, but through trial and error I figured out how to make these work for me.
A year or two ago my skin really shifted and went from dry/combo to combo/oily depending on the face zone. It wasn't appreciated, at all. None of my old face care products worked. I started getting really deep and painful cystic pimples, and started breaking out in different areas of my face. In my younger years I would have went to town trying to pop them all but I've learned my lesson and it almost never works out in my skins favor. I'd try and bring them to the surface but was often unsuccessful. These pads helped about 50% of the time to bring them down in severity a bit. I've never successfully erradicated a deep, burried pimple with one of these before.
What I've found they really help with are pimples that have come to a head. They're great for pulling all the gunk out of there. I really really really try and leave them to heal on their own, but sometimes I just can't take it- there's a pocket of pus on my face. I'll clean my face and gently express them before covering them overnight with the acne pads. By morning the pimple is often gone or nearly gone, and just like the directions say, the pad will turn milky white right above the pore. It's kind of satisfying to see the little cloudy spot on the pad, take that zit!
Sometimes when I try and express a pimple, it doesn't expess fully and hours later the head will have reformed with a vengence and the area will be irritated. This really cuts down on that. Which is great, because those are the ones that scream "Not only do I have adult acne, but I stood in front of a mirror last night picking at myself until I went cross eyed".
I haven't gone full nerd and run the numbers on what the success ratio is for pimple poofing, but I've had enough success to reorder and keep using them. It's always disappointing when I wake up and still have a pimple, but acne is really more complex than just sticking a sticker on your face and it fixing everything, and mine definitely has a hormonal aspect.
These were harder to use in the summer, when it was so humid that when you stepped out of the shower in the morning you felt like you were stepping into another shower. They never wanted to stick when I couldn't get my face to dry properly first. There were a couple times I sat in front of a fan before putting them on. I haven't tried them in the winter yet. My skin might respond differently when the air is more dry.
They stick pretty well. You know if you've got solid adhesion or not, and when they are on properly they will stay on all night. I've had to peel a couple off the floor of my bathroom from when I've peeled them off half asleep in the morning and missed the trashcan. They like to stick.
The packaging is all right. They come sandwiched between two clear sheets of plastic film, and you have to peel them off to get them on. These aren't like bandaids, which are designed so that you never need to touch any part of the underside. You have to dig them off the sheet, which means sometimes you can fold them in on themsleves. Usually this is fine, but there were a couple times when I gave up on straightning them out and just grabbed new ones. This seemed to be a humid summer night problem, and to be fair half those nights I just gave up completely and sat naked in front of a fan while trying not to let any parts of my body touch, or I'd have to peel myself apart in much the same way.
My big annoyance with the packaging is it's small, clear, and thin, which is both good and bad. I actually lost them for about five minutes when I brought them out of the bathroom to snap a picture. The small size is nice, but I don't want to lose them either. It would be really easy for these to slide down the side of a counter or drawer and disappear until the next bathroom remodel. That works in their favor at the same time. An unopened box is about the size of a standard smart phone, so it's easy to have a small backstash without making your cupboard explode.
So in short, I reccommend these for certain pimple sitations, just don't expect them to be magical fix-all. Pimples and acne can be far too complex for that.