So happy with the E Pen. Have tried a few other brands in the past but didn't get on with them but this one is working brilliantly for me. It's a little expensive for the refill capsules but a pack of 3 are approx equal to 3 packets of cigarettes for me, so at a third of the price of smoking I am still making a large saving and also feeling much healthier.... my exercise tolerance at the gym has definitely improved in the last 3 months.