Still new to vaping, only two weeks now, and I already wish i had done more reasearch. I started vaping with the safe cig and soon discovered that i was allergic to their juice. I developed a huge rash under both arm pits and the sides of my body. it was like a sunburn, red and itchy as all hell, I'm not really sure if safecigs juice is 100% PG, but it doesn't like me. so being a cheap ..., I saved the empty carts and refilled them with my own juice. I went to a 50/50 blend in 5 carts and a 100 Vg in 5 carts. I noticed a huge difference with the 50/50 blend and have only had a mild , very very mild rash a few times and then only if I vape heavy. with the Vg no matter how much I vape no rash. now I'm doing reasearch to move up to something bettter, like the kgo or tgo I also really like the new LEA, Silly I know but I like the idea that I can cap it. but I want to minimize how often I have to switch out batteries. and I have also considered the Megladon, which is what I should buy, cuz, by the time I stop screwing around and spending money on little e-cigs, i probably could have bought two "dons". Anyway, just my two cents, hope it helps someone.