I had to fight with very dry nails the last few months that's why I bought it. Especially the nails of the forefinger was weak and was breaking in layers.
Price: about EUR 9.- so it's still cheaper than OPI and a little goes a long way. With 13.5 ml you can use it for a year or so.
It's an intense hydration base coat with vitamin A, C and E and 10 natural oils that should nourish and care your nails.
But the best: it really works. My nails are stronger, no breaking in the last 14 days! I wasn't expecting such a fast improvement.
And also the nail polish above stays better. I did my manicure last week and now I have to do it again just because the color grows out, not because of splitting nails or shivered color.
The only thing, I don't understand is why they had to use a small brush. I already mentioned it, when I bought it (see here). All the colors have a wide brush which is so much more convenient. So this is one pencil less.
But still 4 of 5 pencils!