Didn't like it at all. The gun reloading animations are rediculous. Why does it have to take 10 seconds to reload a pistol, and why does my camera have to fly around while doing so? I'm so used to SOCOM, I couldn't get used to this game. Also, it is in no way a Halo killer.
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I play videogames with a grapefruit on my ****. It helps me get in the zone.
if u do decide to rent killzone, dont play battlefields (deathmatch sort of thing). play the campaiggn... the movies rock and its way more exciting and it feels like ur in a war. there are also mounted machine guns and tanks, flying bikes with machine gunz sort of things etc. it is way better in the story mode.