There is a learning curve and a certain amount of trial and error involved, but I am very happy using ecigarettes. My adult daughter and I had quit smoking 7-8 years ago, when prices got to the point where we could not afford to smoke. The desire was always there. About 2 years ago, circumstances in our lives were really stessful, and the desire to resume smoking was really strong, to the point that I was ready to go out and buy a carton. My daughter had seen something online about ecigarettes. We researched, and waited a few months, and finally got ourselves a couple of starter kits. We have not looked back. No more desire to go back to smoking, no more stinky house, clothing, etc. We are very satisfied "vapers", as ecigarette users are sometimes called. We are both very proud to continue to call ourselves former smokers. I heartily suggest that anyone considering ecigarettes go online and check out E Cigarette Forum (ECF) and CASAA. They have a wealth of information on both sites regarding ecigarettes, and plenty of people who are more than happy to answer questions and help people who are interested in ecigarettes. ECF also has reviews of different products and suppliers, etc., so you do not have to go into this "blind". Effectiveness For my daughter and myself, they are very effective at keeping us from going back to smoking. Ease of Use There is a learning curve, but ecigarettes can be as simple or complicated as the user wishes. We started out with automatic batteries and cartridges that resemble cigarettes (except that I have never seen a purple cigarette, or a cigarette with a blue led tip). We learned to fill the cartridges with different flavored eliquids, and experimented with different nicotine levels until we found what worked for us. We have now moved on to manual batteries that have a longer use time and refillable "tanks". Still a pretty simple setup compared to what some other "vapers" have. The really nice thing about ecigarettes is that they are so very customizable. You can have a simple setup that is very easy to use. YOU are in charge of how much nicotine is in your eliquid. YOU can decide how much pg/vg is in your eliquid. YOU can choose whatever flavors you want. Yes, there is a learning curve, but it is only as difficult as you want to make it. Side Effects We have not found any so far. If your nicotine level is too high or too low for you, it is fairly easy to figure out and adjust. Some people are sensitive to pg or vg or some of the flavorings. Again, fairly easy to figure out and adjust. Immediacy The nicotine in the ecigarettes does not hit at once like it does in a cigarette. You are not getting all the chemicals that are added to cigarettes to "enhance" them. Having not smoked actual cigarettes for 7-8 years, we did not notice this as much. Current smokers will probably notice it, and have to adjust for it. Dosage Control YOU are in charge of the nicotine level. You can even go down to 0 nicotine if you so choose.