The vapor delivery definitely seems good, especially for mental stimulation and satisfaction. I think the gum might be better in some regards, perhaps just because of the consistency of the dose. I haven't put enough effort in to figure out how much I have to vape in order to get a 1mg or 2mg dose… I usually just have a little session for a few minutes.For fat-loss results, it seems to help. Not drastic, but seems to help... though I don't have enough data to compare fat-loss rates with and without it, so I can't offer reliable comparison. Just seems to me that it does accelerate things.