No, I never had that experience... but after awhile I started drinking less and less coffee and now have only three or four cups in a week. (I used to drink that in a morning!) My overall experience on this was incredibly positive. My blood pressure improved dramatically. After the first couple of weeks, I slept better. (However, I've been dealing with perimenopausal insomnia for a few years now... that comes and goes.)
I'd take Chantix all over again if I had to make the decision. Fortunately, I'm never ever going to smoke again... so I won't have to.