I use the Head daily and after more than 16 weeks, a fault in the software has occurred. Head to himself, he is an attractive head with a bunch of settings that you can make for customization. Amazing that Liquid tastes more intense after the flavor that you just evaporated, as on normal battery makers. z. B. Ego t or the like. the VV or the VW features are great and it can be customized depending on the resistance of the evaporator. Easy operation is distinguished from the Head. I use no other more. A few days ago suddenly occurred a failure in the display, steam I could nevertheless perfectly. I then get on Mr. Smok a very friendly and courteous advice on an update of the software and it is also overcame dierekt. Unfortunately, no success, still erschin on display "please download via USB". After renewed contact with Mr. Smok they asked me to send in to the Head and to make himself an image. I shipping the Head on the same day and the next I was informed by telephone about the status of the analysis of the defective product. Grßes praise my hand !!!!! Very friendly and absolutely customer-oriented, which is not of course for some of our competitors in this segment, I was always informed when it came to the status of my Control Head. This may appear a problem in production is aware. Then, however, it depends on the provider to take action. And of such support as I have received from Mr Smok, so some suppliers could cut on this platform a disc. All in all a top product with customer-supplier.