Craft CMS is a new player in the PHP CMS field. It does not use Symfony components, but is a popular and more modern option for WordPress.
Craft CMS is a relatively new player in the content management field. It has a good set of features and a solid easy-to-use interface that easily rivals WordPress.
Extensibility and complex real life Content Management scenarios with Craft CMS remain to be seen. The implementation is clean, but it shares very little components with the larger community.
Craft is a welcome entry to the CMS market. With a commercial business model it also has direct financial backing from users.