Excellent product, far superior to other e cigs I have tried. Haven't smoked an ordinary cigarette for 5 days and don't feel like I'm making any sacrifice. The only reason I haven't given this the highest possible rating is that the cartridges don't last long, I'm using 3 a day which is working out to be relatively expensive. Unless I can access discounts, I may have to discontinue use, but would be very sorry to have to do so.