On Saturday I was teaching the Quilter's Wallet by Pat-e-Patterns ( http://www.pat-e-patterns.com/index.htm ) in a 4 hour class and I finished my wallet on Sunday.
You can make this wallet with 5, 10 or 15 credit card slots. I like to make the wallet with 10 credit card slots and that's what you see in the pictures above.
One very important thing with this pattern is to really label all of your cut out pieces and place the numbered pieces in the appropriate stacks, or it's like putting together a jigsaw puzzle.
For the class I prepared the labels for the students, so they just had to cut them out an attach them to the appropriate fabric, batting, lining pieces, as soon as those were cut.