This has been my life-saver. I had nails that tended to crack and were very soft. But this is heaven on Earth. I've been using this as instructed for four weeks (one week without) and am amazed by the sudden strength and longevity of my nail length. It really does what it says on the tin - or bottle. And, once you see the outcome, you'll realise how nice your nails look with growth and not want to bite them! There is so much I could say about this, but I would just be rambling, so I'll stop right now!
Personally I have no qualms which this product, but some have said that overuse had caused the opposite effect and made their nails brittle. Maybe, you'll have to play around with it to see how it affects your nails, but worthy of a try.
For £18 it's a bit ridiculous, but there are amazing deals all across the internet and lots of varieties for you to try!