Bought for $8.88 at Walmart. I probably won't buy it again because it should be cheaper.
It doesn't make your nails that hard. Mine still bend after 1 coat and after a few coats. It stays on and its shiny, but that's about it. I'll give it a while longer, but I so far don't think its great, just an average nail gloss. It smells very strong.

WORKS!
I have the worst nails ever. They are terribly thin. They bend, peel and break. I can never grow them longer than my finger tip because as soon as they get that long they bend and break off.
So I found this on MUA and bought it at walmart, and it's amazing. I have tried so many things and let me tell you, give this stuff a few weeks and your nails will be a lot harder. I can't even bend mine anymore.
I use it under my nail polish as a base coat too.
Just follow the directions and I promise your nails will be better!

It works! Relatively cheap, too. The cap on the bottle is a little crappy, though.

This is the only thing I use that managed to grow my nails. It makes them super hard and resistant to breakage. I would give this 5 stars, execpt for two things - it turns the nails yellow over time, and it causes a bit of peelilng. If they could fix those things, this product would be perfect. But still, the best I've tried.

This is so far the best nail hardener I have used. My nails are often very soft/bendable and they peel at the top. Witchcraft products have been the most effective brand I have tried so far, and I use this product regularly. My only complaint is that if left on too long, it begins to peel off in a way that I feel might be damaging to nails, so a weekly application or safe polish removal is necessary to see results so you don't undo the benefits of the treatment.

Makes nail polish to stay for a week without chipping

I bought this at Wal-mart for $9CAD (10mL) and wow, no regrets! It glides on and levels out like a pro. Even when I get lazy and start applying super-thick layers, it doesn't bubble or pool. It applies clear, unlike it's worthy competitor "Seche Rebuild" which has a "milky" appearance. It has a strong smell but it dries fast so the odor doesn't linger. Instructions say to reapply twice a week so I don't bother applying polish on top (although I don't see why you couldn't because it forms such a smooth base). My nails are rough and dry from months of filing off gel nails but my nails definitely feel more rigid and stronger and will soon make a full recovery thanks to Witchcraft! [EDIT] Oh. My. God. I have to say it again: "this stuff is amazing". My second week of using this product and my nails seem...back to normal!! I no longer see signs of filing and scraping! My nails are starting to grow past my fingertips but they seem solid enough to withstand bending!

Now i know why they call their line of products witch craft,its litterly like magic my nails felt stronger after one day of use im incredibly glad i bought this product. Here in canada its hard to find products this great! I've bought every nail hardener,stengthener and growth treatment none works as great as this.Ever since i was little my mom told me to buy this i would never listen so i gave it a try and now im so excited i ever did. I strongly recommend anyone with splitting,cracking,weak nails to buy this cause' you will achieve "Rock Hard" nails!!! its been two weeks and my nails are long and strong!!!!!!!!!!!!!!!!!

O.M.G.
I have used pretty much every nail treatment out there to try and get my brittle, peeling nails to grow. I know that Witchcraft has been out there for a million years, and that if it weren't any good, it wouldn't have been, but for some reason I hadn't bought it before.
Boy, am I kicking my own ass now. I've been using it for just over a week and holy guacamole. My nails are unrecognizable. They're stronger, the peeling is reduced by an incredible amount, and they're growing really fast. When I first started using it, one nail had broken right off, and now it's just over 1mm long - may not sound like much, but it's the nail that peeled and broke the most, so I'm impressed!
I don't like the fact that the formula contains formaldehyde, but I am vain enough to want beautiful nails, so I'm going to keep using it!

I purchased this at Wal-mart for around $8 CAN I believe, and am really glad that I did!
For a girl that has brittle (they break easily) and flaking nails, I wanted something that would make my nails stronger. I work at a bookstore as well, and no matter what I did, sticking my hands in and out of the books also seems to ruin my nails.
Anyways, this stuff is great! I wear two coats underneath my regular nail polish, and one on top. It keeps my nails strong, and my polish long lasting.
The only time I get breaking is when the polish begins to chip off the tips of the nails. I agree with the MUAer that said that when they don't wear this treatment, their nails get very brittle. This is the same for me, and though it's annoying, I just try to keep up with the treatments (applying at least once a week).
The smell isn't that great either, it's super strong, but I just do my nails outside in this case.