As I said in the other Metal Gear thread, I've only played MGS, the one for the Gameboy Color and Metal Gear Ac!d. I figured I'd give this demo a shot and see how it was, its needs work in only one, buy major department.
This game looks amazing, the sound is great and the action is fun. However, the controls are some of the worst controls I've ever experienced. I have no idea what they're going to do when the game is released, but the demo only has two control settings. One where you move the camera around with the face buttons and perform action with the d pad and shoulder button, you move around with the analog stick...nub. This feels extremely awkward and you will be fighting your instincts to use the face buttons for actions.
The second control setting using the analog for movement, d pad for the camera and face buttons for actions. This way feels more natural, but you can't use the analog and camera buttons at the same time. When you aim you can still move, but you move the cursor with the d pad, making aiming very slow and difficult. Plus, since you're using the d pad and not the analog, the cursor feels very slow and stiff, making aiming a pain.
Last, but not least, you can't pause this game. There is no way to stop the action, everything from checking maps to switching items is done in real time. This wouldn't be so bad if the controls weren't so weird, causing you to constantly push all of the wrong buttons, especially when some shit is going down. Anyways, this game could be great, but the controls need to be fixed.