Let me make a full disclosure, my review only applies to the game as it relates to the PS3 Move.
I have not been a hardcore gammer. The last time I dominated gaming was Supertechmo Bowl for the original Ninetendo. I just purchased the PS3 within the past week. I only did this to get the Move. I wanted to play a first person shooter to make sure I wanted to keep it. I haven't played a FPS game in a long time. I was never any good with them on the PC. I bought the MOVE system and went with everything I could. Made sure I got the gun and the other extra stuff.
The other game I got was SOCOM 4. I realized one of the most important things was to be able to duck and shoot. I think I've got it down in SOCOM (at least I can do it).
In Killzone 3 I WAS UNABLE TO BE ABLE TO DUCK AND FIRE EFFECTIVELY. The problem is the way the buttons are configured it makes it very hard to do certain things. This flaw was fatal for me.