I also own a DNA device. However, without that objective data how do we know how accurate it is. Can it output in .1 watt increments across its entire power band and resistive range? No discredit to DNA devices or any other mod for that matter, but that is a difficult feat to accomplish even with the most sophisticated and cost no object power amplifiers. Now for the purpose of vaping do we need such accuracy? Personally I don’t think so but I am just one user out of many. If these devices are accurate to within a certain limit, and users can detect changes that small, then there is a valid reason to having that level of adjustability. However, without that objective data, and unsighted user testing, how can we say for sure.