I've had great luck with them, personally. They're lasting me a couple of weeks. My Ego One coils are horrible. I burn them in no time, even the new CLR coils. I use the .5 Kanger coils and I do prime them well and let them soak in juice a long time before I start, and I do start at low watts and work my way up without chain vaping, giving it time to get wicking properly. Are you sure you aren't getting counterfeit coils? I ordered my Subtank Nano clone from Fasttech for $13 and that thing came in a Kangor box that looked just as real as any Kanger products you'd see in a store. I would not be surprised if there are knockoff coils posing as authentic Kanger products. I'm only on my second vertical Kanger coil though and have noticed these are showing higher than the .5 ohms they are supposed to be showing. They're over .6 ohms. Maybe I have counterfeit coils. Who knows? They're working great though, unlike these Ego One coils that seem to burn up in no time no matter what I do. I prime. I've tried the "pin trick." I let them sit in juice for a long time before I use them. I start them on a variable wattage device at lower watts and make sure they are wicking well before I put them on my freshly charged Ego One, and they still burn up in no time. I like my Subtank Nano on the Ego One, except for the higher ohms which produces lower watts and a less satisfying vape. I prefer running those coils at around 36 watts, which fries Ego One coils quick. If I get an Ego One coil that lasts more than a day or two I feel lucky. So many of them give me burnt hits before I even get one good long pull from them. I just burned one a minute ago. I primed it like crazy, poked a stick pin through it like people recommend, started it on a mech mod with a nearly spent battery, let it rest between vapes and only took short vapes every once in a while the last several hours, put it on the Ego One and took only a small pull or two hours ago and let it wick some more and just now took a hit and got that wonderful burnt T-shirt taste. I hate this thing. The old Ego One coils were better than these rip off pieces off garbage. This thing is unusable.