The part for me where it breaks down is when you have to flip the card to the back to fill in the CVC. I also hate when fields auto-tab for me. Also, why does it hide the expiration date and name fields initially?
Wait, the card actually flips? I completely didn't realize that the first time around. As for the second time around, I still don't know how to flip the card. What am I missing?
EDIT: And fill out the entire front.