Glitchy Tasty's Ryan Farrenkopf has reviewed Killzone 3. In the artcle, he goes into detail on how features like Move Support and the overabundance of cut scenes are relatively hit-or-miss. While he praises certain aspects of the games' design (diverse environments are one prime example), over points of interest like the cover system are totally broken.
"On more than one occasion I found myself avoiding the use of cover, as it would mean certain death. I also encountered a bug that wouldn't allow me to shoot from cover, requiring me to remove myself from cover, exposing me further to gunfire, then take cover again just to shoot."