I give the reviewer a 4.0 score!
For the guy who says "I didn't have to use the ground shaping much" obviously didn't play it on Hardcore. Try playing it without ground shaping and see how long you last. It is challenging but not frustrating by any means. It makes you actually think about strategy, which is hard to come by in games these days.
So my advice is this, if you believe the reviewer from gamespot, then go rent it, its still that good enough. If you want a challenging game that makes you think more than just pulling the right trigger, then go buy it. And I also have to agree with some previous player reviews. I used to use gamespot reviews as gospel, but lately, I find myself looking at other sites or flat out buying the game regardless of what the gamespot reviewer said. I haven't been wrong yet. So gamespot, get your act together and quit canning decent games with ok or bad reviews.