I took it for 7 of the 12 weeks of the program ... but quit taking it because the crazy ass, vivid dreams just left me too exhausted all of the time.
But, I took it long enough for me ... I haven't had a drag off of a cigarette in over 2 1/2 years and the smell of it still makes me want to vomit.
I smoked for almost 25 years ... and quit cold turkey about 200 times. So yeah, that way doesn't work for a lot of people ... some people just need a little help.
Since nothing bad happened to me from taking it I'll say yeah, it was worth the risk for me ... I was educated of them before I made the decision to try it.