There have been quite a few threads here about this.
I bought an Ego-T last fall. I used it intermittently for a couple of months...just to get used to it, (it's NOT like smoking a cigarette) and continued smoking. After the first of the year, I decided to finally use it to reduce my smoking...cut down 1-2 per day until I was down to only 1-2 per day. A little over 2 weeks ago, I smoked my last cigarette.
I'm still a nicotine addict...and there are times when I'd love to light one up...but don't.
I bought my starter kit here:
http://www.cropduster901.com/store/index.php?main_page=product_info&cPath=9&products_id=87
He was local to me at the time...pretty decent guy, explained the process and equipment.
I found a local shop here for my "juice." I recommend that so she can find a flavor that she likes. The variety of flavors that are available is astonishing...most are "kiddie flavors" IMO, but whatever it takes.
She should NOT try to immediately stop smoking with one of these, but rather, work it into her smoking regimen a bit at a time until she's comfortable with the change...and use it to slowly eliminate "real" cigarettes.