THE CLAIM Think of it as five productsa keratin-and-amino-acid growth treatment (which fortifies and protects nails), a filling base coat, a strengthener, color and a quick-dry top coatin one bottle. Plus, it has an extra-wide brush for full coverage with one sweep. THE EXPERT SAYS "Home manicures typically don't last as long as professional ones because you rush through the coats and don't let them dry completely," says N.Y.C. manicurist Jin Soon Choi. "This eliminates that problem. I've even started using it at my spa." OUR VERDICT Our nails looked perfectly groomed in a flash. After four days of constant tapping on our keyboard (and occasional dish washing), the color was still glossy and chip-free.