I've used it for 10 days, it's really crazy, the Loong Shell makes Marlboro cigarette sweet! Sweet taste!! The cigarette becomes sweet taste by controlling the combustion temperatures!! This is the most incredible experience in my life. What's even more crazy is that a cigarette can be smoked in the Loong Shell for MORE THAN an hour! Crazy!! I've gone from 1 pack of cigarettes a day to 3 cigarettes a day, thanks to this crazy device, genius invention!