When we were first looking and learning (only a week or two ago haha), the whole green vs blue vs white thing didn't feel right...it seemed like what we were looking for, but it all felt too easy and "consumer packaged" if that makes sense. While reading reviews they all sounded a bit too consistent, conforming like...cleaned up, edited. I think it was Doctor Vapor's vids on you tube that clarified how the parts are interchange-able and there were options beyond the green blue white sucker-bet. From there, it was only when I stopped searching for "e-cigarettes" / e-cig and searched "vaping" that the entire tone changed and we found the real deal. We're very thankful, therefore, to the Doc, Grimm Green and the ECF for helping us find our way so far and really learn. Thanks guys! As GG says: KoV!