Heres my opinion:
Worth getting? yes
Worth waiting for the used copies to appear at the game stores? Yes
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Its like Devil may Cry style of gameplay which will be noticed by people who have played it. The story is good, it continues and goes further into the whole Vincent Backstory.
Lots of old ff7 areas which are cool but then there is a city that did not appear in the original game, which was kind of odd.
Reeves is big in the games story and so is Yuffie to an extent though you always are either fighting by yourself or with a few random soldiers you have to save.
You can customize your guns with different accesories which is cool. You have 3 base guns and can you whichever accesory more than once on any of the guns. But it just boils down to you want a: pistol, rifle, machine gun.
I liked playing it, gameplay was short, but there are a bunch of extra missions which are very challenging.