Wow. Thanks morandir, harmony and plarkinjr. This is so helpful. Especially since I already have several friends who are asking me questions and thinking of trying it. I'm starting to think that maybe having a couple different strengths is the best way to go. So if I only have a short time for a quick vape, I use the stronger one and if i'm gonna be vaping alot for a long time like at a bar or something then I could use the lower nic level. Thanks for all of your help.