I can attest to all of the already mentioned products. Nailtiques is expensive but yes it does work, I also used Orly Calcium Builder, I did not see much growth but my nails got stronger, and then there is the reliable Sally Hansen maximum growth products (there are 2 of them, 1 for the first week or so and then the one that maintains the strong nail). I stopped using Nailtiques because it was too expensive I used to get a store discount at Genovese (this was way back when I worked there) but after leaving the 18 bucks for the product was a bit much .... but then again I find Sally Hansen's product to be a bit expensive, 5 bucks for some nail polish is a bit much for me.
Anyway, I have been using Sally Hansen since, it works as well as Nailtiques did for me. A big point I wanted to make was that, I think my nails started to go and will continue to grow no matter what product I use simply because I am taking care of them. With Nailtiques as well as with other polishes such as Sally Hansen they say to use it for one week, clean and manicure your nails and then repolish .... if you think about it, your nails are really growing because you are caring for them and paying attention to them, so don't feel pressured to purchase polish for 20 bucks or pay the local manicurist 15 bucks - unless you are trying to treat yourself, you can do the same thing with better results at home. The same thing goes for your hair, but I refuse to do my own hair, so to each his/her own
LOL