I used to have issues with a smooth polish application on my nails. My nails are brittle and in the last few years, I've noticed ridges on several nails on both hands. With Essie Ridge-Filling Base Coat, every application goes on smooth and finishes beautifully. I would highly recommend this product to anyone experiencing problems with smooth application, or having to apply several coats of polish to their nails. This product helps you achieve this with one coat, saving lots of time.