I have been using the Vype e-pen for about 18 months. It has definitely helped me stop smoking cigarettes, which is the primary reason I'm using it. The product is generally good. It's easy to use and gives a consistent and satisfying amount of vapour. I have used a few different "ready-made" e-cigarettes (by that I mean products that are self-contained, where you don't mix your own liquid) and the Vype e-pen is certainly the best in terms of the amount and consistency of vapour produced. The pen charges quickly (~2 hours) and I haven't felt the need to get a second battery (I always make sure it's charged before I go out for a long time; otherwise I'm almost always near a usb charger of some kind so quick intermediate charges are not a problem). I use about 3 caps per week and with this usage, I charge the e-pen about once every 3 days. I am now using the 12 mg caps, just switched after using the 18 mg caps for a long time. I'd say, if you smoke but not that much (say, less than half a pack a day) then you can go straight to the 12 mg strength. Unfortunately, I first ran in to this product at Tesco and they only stock the maximum strength caps. Now that I'm adjusting to ordering everything online, this isn't a problem. The company has always been very courteous and responsive, something which I can't stress enough! The first e-pen I bought broke quite easily. I got in contact with the company and they immediately replaced it free of charge. The second one I have seems to be sturdier, as I've had it for over a year and it's still going strong. There are some signs of wear and tear; a bit of paint has come off the buttons on the corners (hardly noticeable though) and the hard white plastic part that the e-cap or charger screws onto has 4 tiny cracks, two on either side. None of this has affected performance. It is certainly important to not screw anything very hard onto this part, as stated clearly in the instructions. There are a few issues, which for me have been relatively minor such that I haven't decided to try another product. These include occasional cap leakage (apparently this is not supposed to happen, but it definitely does). I tap out the outer cap cover and wipe all parts down with a tissue and usually everything returns to normal. I try to keep the e-pen sitting upright on the battery end when I in the hopes of avoiding this. I'm not sure if there is anything else which can be done to stop this from happening; I have noticed that the caps have changed, ostensibly to prevent this? They now have tiny ridges on the inside of the outer vapour 'conduit' part, and I can see that they do trap some not-so-well vaporized liquid. All in all, for me, this is a good product and I will continue to use it until I can finally, someday, quit altogether. If they continue to improve the build quality so that the inside parts don't crack, then I'd give 4.5 stars; if the caps never leaked, I would give 5 stars for sure.