First off, Uplay is in beta, so i think you all know what that means.
I don't know what your plans are with regards to which version of conviction you will buy?, but i was planning on buying the standard version simply because it's the cheapest option for me. In the standard version i believe what you get is...
Conviction SP Campaign
You have to complete certain actions whilst playing Conviction to gain Uplay points, then you can redeem those points for rewards.
Those rewards give you access to certain weapons, outfits and Infiltration mode.
But unfortunatley i have noticed in the Uplay forum,gamers who have redeemed their points for rewards are not getting the contents showing up in their game, meaning they don'y have access to Infiltration mode nor unlocked weapons.
So for me personaly i now have to try and find the extra money to purchase the exclusive collectors edition which has doubled the purchase price for Splinter Cell Conviction PC version.
It's not that i'm impatient it's just that i'm not prepared to wait for ages for extra content to show up in game that should really be in all editions of Conviction.