They are, by far, my favorite! I usually buy 2 packs at a time and they really last forever! Admittedly, I do reuse mine (by that, I mean, the 'front' and the 'back') and I have had zero issues. They remove mascara with ease, even waterproof! And if you find that one has gotten 'dry', just run it under a dripping faucet for a sec and then squeeze...totally rejuvenates itself and is ready to use. I would recommend getting the blue plastic box on your first go round though. Then you can just buy the refill packs from then on!