Yeah, overall not happy with this. Discovered this on the iPad Mini 4. On the one hand, you can customize with different colors (black back and red front, etc.) - and I imagine eventually other accessory makes will make products that interchange with Apple. On the other hand, purchasing them separately is more than a little more expensive than the single. (Oh, and the mini 4 is slightly taller than the mini 1/2/3 so some of the accessories, like the smart case and various keyboards like the zagg, won't work with the mini 4).
I don't mind as much on the mini because my Hitchhiker's case still works fine, but for the Pro I just purchased the cover. Blah!