My nails always been something that I wasn't happy about, in my young teens I kept on biting my nails. Then somehow I stopped. After a while they started to break and chip, so I kept painting them to cover the chipping, but everything got even worst. Now I can say I'm happy with my nails, I love the way they look, although they do break sometimes, but not as much as they used to.
In my past I had tried many nail strengtheners and none of them worked. They just worked the same was as clear nail polish. The O.P.I had improved my nails condition a lot, they got much more longer, they never had been do long, as well as they are stronger. I can't say anything negative about this. As it's says on the packaging you should first apply two coats and then add another coat every over day. I don't really follow this rule. In my opinion it's just waste of this product. Most time I wear it alone or as a base under a nail polish. There are 6 different types of Nail Envy, I have the Original version. When I will be out of this bottle, Dry and Brittle Nail Envy is next on my wishlist. I also added Calcium and Vitamin D supplements to my diet, this had also helped.
In my opinion this product is worth the price, I got mine from buyapowa.com, so I saved some money. I would strongly recommend it.