It seems strange to me that with all the talk about the importance of quitting smoking that Tabex is not well known. A course of treatment lasts 25 days, costed me €35 for the whole course, you can buy it online, you stop smoking on the 5th day, and it makes quitting a lot easier. Really.
It does still require motivation in certain situations when you used to smoke before (going out drinking, clubbing, etc.) but it's still much easier than with anything else we tried, and after the first couple of weeks your brain rewires itself. Five months in, going out with friends who still smoke, we were both not tempted to take a cigarette from them. This is huge for us.
If you really want to quit smoking and everything else failed so far, give it a try.
If you do buy online, just make sure it's not a counterfeit. I don't have any advice regarding that, we got ours at a pharmacy on a trip to Poland.