[+] Pros and [-] Cons in order of most to least relevant.
[+] One of this generation's graphical/animation highlights, especially the bathroom interrogation (except the cutscenes looks like last-gen material). Very optimized engine, bodies don't disappear and neither do bullet decals.
[-] Gray-scale shadow system. There's spots where you don't know where the shadow ends/begins and I'd rather they use heavy shaded corners that would lower opacity as a warning when close to leaving/entering shadow areas and still keep the hues that look amazing in color.
[+] Best cover system since there's no guess work when transitioning. I also like Sam's roll and slide.
[-] Inconsistent lip-sync (bathroom interrogation is flawless, but ending cutscene is way off).
[-] Cliche goons casually talking about the secret plan.
[+] Flashbang effect on Sam is great. Holding a hostage and throwing him through a door is badass.
[-] No arc destination for throwing [grenades/cameras].
The gray-scale is the big deal breaker, especially with no Spies v. Mercs multiplayer so I'll most likely watch an online playthrough of the retail game.