I love this wallet.

Four Sections
This wallet has 4 sections.  It has the normal two sides found in usual billfolds, plus a 2-sided center flip.

Thirteen Slots & Pockets
Three sections contain 3 slots each (9 slots).  All four sections contain a side-entry pocket (4 pockets).  Three of the side-entry pockets hide behind their 3 slots.  The fourth side-entry pocket has a visible window with no slots hiding it.

Good Fit
All slots & pockets are large enough to hold business cards & plastic cards without jamming them in.  Yet they hold the cards firmly even if you double up.  Six slots have a corner niche cut from them to make hand withdrawal easier.

Paper Spaces
There are two paper spaces at the back of the wallet for paper currency or folded documents (e.g.: durable power of attorney, meds list).

Bad News
Jam as many cards in it as you like.  But eventually you won't be able to zip it shut anymore.  I had to limit myself to 22 cards.

Kudos
This wallet was either designed on another planet by intelligent aliens or on this planet by actual consumers.