I have a Buzz and a Provari. I got them because if they do ban I will have some excellent mods. I never vaped higher than a ego before I got them and I gotta say even 3.7 seems better on these than a ego.It's alot of fun playing with the voltage I keep it between 3.8 and 4.6v I also have a GLV 2 that I won on the way and just ordered a GLV mini yesterday.