I've had 2 Kings, Profile, Pro2 ... Kings are absoloutley amazing! never skipped on me, they won't skip aslong as you maintain them correctley. Pro2 was also amazing ... just less engagement but you can hardley tell to be honist with you, allso pro2 is alot easier to service. Don't need a specific kit to service to take the freehub off and clean insides out. Just go for what you want your choice! Both amazing Hubs.