I just purchased my black and red hybrid ProVari yesterday and have since fallen in love with it. Last night I was vaping some of my 24 mg juice (all my juice is 24 mg besides one 50 ml bottle of 36 mg) A few times in my vaping career I have used the 36 mg and taken a few drags and then felt that all to familiar nicotine buzz where you feel very dizzy and disoriented a little and just all around "buzzing" it gets pretty intense for about 20 mins and I have to wait for it to pass before I even crave another drag. Well last night I was vaping on my new ProVari with the 24 mg juice and I think I only took 3 good drags before I felt that kind of uncomfortable nic buzz and had to leave my ProVari alone for about 25 minutes. My point is this thing hits hard, alot harder than any other model I have used. Dont get me wrong, not complaining just letting everyone out there know if you want a very efficient device the ProVari lives up to the hype