A good device to help "kick the habit". Battery life not brilliant if you are a heavy user, then you have to wait a couple of hours while recharging. Ideally you need a spare. Epen caps rather expensive again if you are a heavy user. Would be nice if there were more flavours to choose from. Am bewildered why VPro caps are dearer. Produce a nice thick vapour and duel strength button good. Overall quite happy with Epen, just wish accessories and caps cheaper or free postage offered on every order.