I got a sample pak from HALO and when I tried to just vape them, it was too strong or too bitter. But I find if I just add a few drops to one of my main juices it is enough. Their twisted Java with a drop or two in a pro-tank with my menthol is very good, where by itself it is just too dry or overpowering. Is Halo meant to be used by itself, or just as an add in?