This Vaporizer is the winning and best...ever!! I has them for over 12 years and never let me down!! I vape it every single day for 12 years, left it on for hours and hours, even if you forgot to turn the air flow off and it will still running for over an hour. Everywhere I go coffeeshops, weed dispensary, medical club etc all have this same device, why? Because it the best that is why! I did send it off to Storz & Bickel for services maintenance twice to insure them to make last even longer. This device save my lungs, really! Because when I smoke joint for years I couldn't run more than 5 minute and breathes like a dark Vader! Now I just ran 26 miles marathon. Expensive device but your lungs are worth every penny of it. I got smaller version called the Big Mighty is suit for compact vape to travelling around with it in the pocket.