No I haven't used it. I had seen a post about it and wrote to KnitPicks to see if it would work with my OS, which it does. If I wanted software right now I wouldn't hesitate to try it because KnitPicks stands behind their sales, I'm sure they would give you a refund if it didn't work correctly.
Thanks again, MZMom! I've since heard from another KPer that what I really need is "Sweater Wizard." Unfortunately this software may not be Mac compatible, and on top of that, it's no longer available--even on eBay! :-(
So until something else comes along, I'm just going to have to depend upon the kindness of strangers to help with my knitting. :-D