I bought this model about a month ago. All I can say is this is the best thing going! I really wanted to quit smoking and tried several times. This has made all the difference in the world! So far three of my friends have made purchases based on my testimony that this product does work. I purchased the refill liquid as well and it's an easy process. I haven't had a real cigarette in 45 days and I'm proud of that! Plus this company gets your order to you quickly! 100% satisfied and my family is very happy that I have given up the habit...Thanks!