It works! It works!
Just follow the directions on the box, which I did, and sure enough, within a week I was seeing growth.
The only thing is, you have to re-apply to clean nails every other day, using alone, or as a base coat, so this can be a nuisance if you go out and get manicures. Well, I guess you could apply over a coat of nail polish, but me thinks it won't work so well.
I'm really pleased to tell you that my nails grew quicker than usual, were less prone to cracking, and nearly had me smacking my precious manicure lady Sarah over the head with an emery board. "Hey, don't file so short there! I just grew those!!"