'13 Update Series - MLB
36 packs - 10 cards per pack
One Auto or One Relic card per box
I received the following:
258 unique base cards of the 330 set - 78% PLUS 50 duplicates @#$%^& -- what is up with that??? 13.8% of the total cards received were duplicates.... One can look at that one of 2 ways (maybe more..) - I now have extras to trade for what I need or I have a bunch of extras when attempting to build a set.

Update Series is the continuation of the base set - Series 1 and Series 2. I really like the action photos. It seems to me to be an effort to capture the game more in the photos. With HD photography and the ability to shoot literally 1000's of shots in a game for next to no cost (discounting the cost of the camera, lens, and the photographer's time) - the pictures are excellent.
Inserts
Parallels
Gold #ed to 2013 and Green Sparkle

5 Gold
6 Green
Black #ed to 62 and Sapphire #ed to 25

Black - Jose Alvarez
Sapphire - Chris Sale
Mini's

9 mini's
Chasing History and Making the Mark

6 Making the Mark
9 Chasing History
Post Season Heroes and Franchise Forerunners

4 Post Season Heroes
5 Franchise Forerunners
Relic

Jose Bautista - All Star workout jsy
###########################
Update Series is a must for the set builder/collector - especially if one has Series 1 and Series 2 completed. The player collector will find several 'challenges' -- there are SP's of some of the players, along with several cards of certain players - all with parallels - gold, cammo, green sparkle, pink, black, sapphire, and 1/1 printing plates. For example - one of the players I like - Wil Myers - has 3 cards in this set (if I'm not mistaken) - that's a lot of parallels to chase.
I like the parallels - and I like to have the parallels numbered - black, sapphire, and gold - it make them even more collectible.
The various inserts are continuations of the previous sets. I believe the Franchise Forerunners and the Post Season Heroes are both new to the Series and both are pretty cool.
Overall grade A-- Waaaaaaaaaaay too many duplicates in this particular box!
Go buy several boxes and send the Rays parallels (especially Myers and Longoria) to me!!
Duane