so, i was looking to buy more juice, as from my experience, when i finally get a vaping device + juice ( i used a smooth e-cig before, that had the juice inside it and could not be replaced. disposable.), I'm vaping ALOT. i mean, alot. this thing is supposed to have atleast 500 puffs. i finished it in 2 days. so, i start seeing the option to get the juice with different PG/VG levels. i know that PG is propelyne glycol, and the VG... i think its vegetable glycerin. anyway, i start seeing options to change the VG level from 0% to 15%, or even 40%. and i wonder, how does it effect the E-Juice? Whats the best option?