Quality materials and good construction and of course, loads of slots for credit cards and membership cards.  All the slots are easy to get to cards fit easily but securely.  The wallet is well thought out (at least for me), with a folding window pocket for your drivers license and room underneath in another pocket for vehicle registration and other less frequently used items.

This wallet is a bit larger than any I've owned before, but it still fits into pants and jacket pockets fine.  (Maybe this is why when you fold it closed everything is nicely tucked away inside and not peeking outside)

All in all, very happy.  We'll see how it holds up over time.

EDIT:  07/30/2013, there is almost no wear on this wallet at all, it's holding up exceptionally well.  No leather tears, no stitching coming loose, no pockets ripped out - even the clear plastic holder for your drivers license is intact and still perfectly clear.  I think I better buy another one before they discontinue it!