This item is very attractive but the thin wood was slightly warped out of the box. I'd recommend this item to anyone that can use it at least a few times, but for one or two adventures, or less, its probably not worth it.
This item adds a fun alternative to boring old 'double-damage'. I'd recommend using the deck for player criticals only. Using it for monsters or NPCs may be fun for the DM, but not the player.
I expected this item to be on the scale of the Dragon Compendium: specifically longer and hardcover. Most of these ecologies were taken from Dragon issues of the last two years and were duplicated for me. All in all, not worth the money...maybe for $9.95.
No one that would wear this shirt is at risk of developing an addiction to sex.