Designs registration is not an alternative to patents but it is a complementary protection.
Design registration is cheaper to obtain than patent protection and the application procedure is far shorter.
If the expected life-time of a product is short, and the product is simple to produce, the design registration may be more useful than patent protection.
In case of registered design action can be taken against an infringer and, unlike with copyright, actual copying of the protected design is not required to be proved. Design registration is good for jewelers crockery, utility items etc.