I have rated this product good as it has helped me quit smoking. Nearly a year smoke free and I was a heavy smoker for 15 years. I'd previously tried going cold turkey or using nicotine gum without much luck. I needed the sensation of smoking and something to hold, old habits do indeed die hard. Just a couple of minor gripes from me which I feel just hold the E-Pen back from full marks. These mainly relate to construction. I have now bought 4 of the starter kits as all tend to break at the same point (where the cartridge screws onto the battery). The first was likely my own fault (too tight) but I have been very careful with the subsequent devices but all of mine have broken in the same way, a small crack in the plastic housing which gets worse until the thing falls apart. I would also prefer a simple on/off switch instead of the 3 click system but I guess this to save space and components in the device. An option to purchase lower strengths of nicotine would also be great. That said, I can't fault Vype themselves, always helpful and went beyond my expectations when an order of mine was damaged in transit. Over all a good device if you're looking to cut down or quit from real cigarettes. Cheaper than alternatives, less hassle than tanks, coils and liquids, pleasant flavours (normally menthol for me) and the battery lasts well even during heavy use. Thanks Vype for helping me quit!