This (along with the Arc mini) has allowed me to give up smoking painlessly; something I never thought would happen: for this I am very grateful! I like the design - my only problems have been: a I find the cartridges somewhat difficult to remove- maybe you would consider adding some ridges at the edges (or something of that nature) to aid in removal? b Unfortunately the epen 3 is extremely easy to lose: I have done so twice already! I suggest modifying the design to incorporate a hole with a ring, or similar device, so that one can affix the pen to one's person or wear it around the neck? These are only minor criticisms; on the whole I have nothing but good things to say about the e-pen 3: especially the ease with which it allowed me to escape the slavery (and cost) of cigarettes. I look forward to any forthcoming innovations in your product range - may I suggest caramel as a new flavour? I have something of the kind in my Arc mini at present, and can recommend it! All the best, Anna (annakist@gmail.com)