The Vype etank is the only e-cig I've tried. For me, it is by far the most effective nicotine substitute product I've tried. It gave me a mild headache the first few times I used it, but that hasn't occurred since. It has made the move from being a long term (30yrs) moderate smoker to a "non-smoker" instantaneous and almost effortless. It's also ideal for controlling/reducing nicotine intake because of the scale on its window and the possiblity of mixing liquid strengths in the tank. It provides that smoking feeling/action with the option of having zero nicotine. It came with a blended tobacco flavour which tasted weird but not unpleasant. I haven't tried any other flavours because I was only interested in the flavourless ones. The low PG content also influenced my choice of supplier. A tankful lasts a lot longer than I thought it would as well. Excellent product. The only suggestion I have is that the flavourless liquid comes in 0mg for that final phase of nicotine reduction.