Apple is pretty confident that customers are going to love its watches as much as its iPhones. The company has pre-ordered as many as 6 million units of the three models of its new Apple Watch. The Apple Watch Sport, which is set to retail for $349, will account for about half of the production. About one-third of the production will be devoted to the mid-tier Apple Watch. The rest will be Apple Watch Edition, an 18-karat gold luxury watch. The price is unknown but it’s expected to be one of Apple’s most expensive items.