The gel layer on your own nails or on your artificial nails should match the shape of a beautiful, natural nail as closely as possible. A common mistake is that the gel layer is 'convex' and has been placed far too thick on your nails/artificial nails. Such mistakes are usually a result of the inexperience and/or poor education of your nail stylist and/or the use of the wrong products. Of course, such a 'thick and convex' nail is not aesthetically pleasing!