I'll keep it simple. The firing switch is a dream, however I'm sure the voltage drop junkies will be clamoring for a magnet upgrade. Threading is well executed and provides a very flush look. Floating center pin is outstanding. Have not pulled out the multimeter yet but I'm very pleased with the performance, even with stainless end caps (looks great IMO) which increase voltage drop. The vape jam rda...wow. That thing needs more professional reviews as it is absolutely spectacular. Deep well, adjustable airflow, designed so you don't have to pop the cap off and curse your o-rings. The whole set up is a bit pricey but such quality. Overall I rate both of these items as outstanding. Better than my overdose by MCV. I would compare machine quality and overall feel of the device to Provari.