Well, here's my feedback...
I agree with ProfCrash that the covers would be more appealing without such obvious placement of your logo and company name. Do make sure that the leather around the device isn't too thick or too close to the screen because it's important for the reader to be able to touch all the way to the edge.
Although I love the idea of a credit card holder on the inside of the cover, it isn't very practical because there's a good chance they'd scratch the screen and/or put too much pressure on it when the cover's closed.
The cases are beautiful, and they look very well made. I love the tooling details. I don't know how difficult it would be and how much it may increase price, but personalization options might be nice—the customer's initials, a name, or a limited choice of designs on the spine and/or front, for instance.
I wish you much success!