This store is setup with Storefront a theme built and maintained by WooCommerce core developers so that you can be rest assured that the integration between WooCommerce, WooCommerce extensions, and WooCommerce Storefront has backing from the best possible team. Following comments are taken from woocommerce storefront website.
WooCommerce Storefront is an intuitive & flexible, free WordPress theme offering deep integration with WooCommerce.
Storefront is a simple and powerful theme which provides lot of customization options. Its functionality can be enhanced easily by using lot of freely available plugins. It can be used without worrying about future incompatibility issues arising because of future updates to either core WordPress or WooCommerce.