Pros: Really works
Cons: Fibers leave bumpy appearance which must be covered by thick polish
I used to work in food services and I had to wear latex gloves all day which would leave my nails soft and easily broken or pealed. I've tried many different nail hardeners to help this problem, but I've found nothing works as good as this.
The first step is to follow the instructions. Who reads instructions on nail polish, anyway? Well take my advice. Paint you nails horizontally first and then after they are dry paint them vertically (normally). This allows the fibers in the nail polish to harden and make a grid like pattern which really works to strengthen them. Just think about it, it makes sense. Normally nail hardener may help a bit, but the fibrous grid stops nails from bending which prevents breaking.
Even though this product works well it does have a few negative aspects. It goes on kind of thick, die to the fibers, and takes a while to dry. It is also hard to remove completely unless you have a very good nail polish remover. When just this product is on, your nails are kind of rough looking and dull. You need to put regular nail polish on top and between all of the drying time it is probably going to take you at least half an hour to paint your nails. One other thing I have found though is that it tends to help the regular polish stay put and not crack off as easily as it would have with out this undercoat. You do have to use a thick regular polish which takes some time to dry in order to cover up all of the tiny little bumps. A thin, fast drying, nail polish will still look bumpy through the base coat.