My current GM went out and bought all of the previous sets of the Game Mastery cards and we use them. The artwork is great and you put the card in a penny sleeve and write a detailed description of the item on the sleeve instead of the card.
When we find a treasure chest, the GM brings out this little ornate chest filled with the cards and we can spend a few minutes picking through and fighting over the loot. It is a lot more fun than just having the DM list stuff to you.
If you have the money to get the cards then I suggest you do as they are a good investment for the serious player and game master.