Some people on gaf don't seem to like the demo as much as me.
I'm really liking it. It's exactly what I wanted from a post-MGS4 MGS game. It's like Acts 1 and 2, seemingly, as a full game. Most of MGS4 gameplay is still there, though the stealth setup is a lot more limited. Only big additions if you're a stealth user are the ability to chain CQC (3 enemies there, you can time it and take them all out) and the recovery balloon, which takes stunned enemies and removes them from the battlefield. It has a lot more of a combat focus, definitely Monster Hunter influenced. It's like MGO if it didn't suck. It's not a real story based Metal Gear from the looks of it and I don't care.