I smoked for almost 15 years, 2 packs a day, 30 days after start vaping (which i loved) with 8mg my throat was too sensitive, i don't know, maybe i lost the pleasure in the throat hit, maybe it was never for me and i just get used to the cigarette, the truth is i went all the way down to zero nicotine in just a few days after start feeling that.
Since then, almost a year ago i'm still vaping, no analogs, just blissful clouds.
For me it worked, but i don't recommend to anyone who is trying to quit, maybe if you get out of the nicotine too soon you go back to the analogs and nobody wants that.
Keep vaping!