It's useless.
They swear it will get rid of ridges. Nope.
They swear it will fix peeling. Nope.
They swear it will fix splitting. Nope.
Four weeks, at least four times a day, and NOTHING about my nails changed.
And they BLOCK all negative reviews on their FB page and their FB ads.
Dig into their website. You'll find a statement that essentially says "don't expect any of these products to actually work." Seriously.