I tried a kanger 2.0 horizontal coil that I got as a sample. I dont know if it was a dud or what, but it was awful. The first hit was fine, real smooth and quiet, no crackle. After a few more hits, man something was real wrong, I got a smell that was of mildew and the taste went foul. It was horrible. I dont know if they used any primer, but I took it off my battery and threw it out. Any one else use kangers and do they use a primer?