I will second this, having enjoyed similar success. The idea is that you start taking it, smoke normally the first day or two, then stop (if I understand the mechanism correctly the drug uses the nicotine to guide it to the correct receptors at the outset and subsequently the molecules self-attach to each other). You take it 4 or 6 weeks - I think 4, but it was 16 years ago so I forget. Contrary to what some imagine, there's no long-term dose. Within the first few days your cravings evaporate, by the end of the course smelling someone else's cigarette evokes a mild feeling of nausea. It's the only approach that never resulted in a relapse of some kind for me.

There are side effects; it can cause stomach bleeding if you don't carefully take it with meals, so if your breakfast is just a cup of coffee you'll need to adjust to consuming food; and it's associated with intensely vivid dreams which can disrupt your sleep. I experienced both but did not find it that bad, I blame myself for playing a bit fast and loose with the mealtime warnings. idk what it costs now but I paid $400 for the full course out of pocket, probably like $750 today with inflation. So, less than 6 months of moderate cigarette use.

It doesn't fix the psychological desire for a 'smoke break'; for about 6 months I chewed gum (ordinary gum, not nicotine) to get past the mental habit of wanting to consume something. Some people reported using a fidget toy to give their hands something to do. My theory is that if you have a severe smoking addition it is probably because nicotine slotted neatly into some pre-existing somatic need, so once you get past the cravings stage it's worth exploring why smoking or vaping became such a big deal for you in the first place.