(sorry for the double post, but in case someone wants impressions for the new page)
Hey, I got the game and played a few levels on the singleplayer. I have NOT tried the multi yet.
Quick Thoughts:
Control settings are identical, if not almost identical. I copied my meticulously tweaked settings from Reflex, and everything fits like a glove. These are the amazing FPS controls that I know and love (and why I bought the game).
The only control differences are: (1) you are given a choice of aiming styles between W@W (described as quicker) or MW:Reflex (described as more stable) and (2) the cursor sensitivity now explicitly says that if you go over the halfway point then your cursor may jitter. For (1), I had no idea what that meant, so I went with the Reflex setting. For (2), my Reflex cursor setting was a 30 and I changed it to the halfway setting, which is a 20. The cursor responds perfectly.
Dive to prone is done by running and then hitting the stance change button.
Graphically, the game looks good. Nothing looks as atrocious as that one multiplayer level that was aptly described as looking "unfinished." I don't know the tech behind anything, but it looks like Reflex.
Unfortunately, there are a lot of framerate drops and slowdown when things get hectic. I'm hoping this isn't the case in multi because the slowdown mostly occurs when there are huge explosions and 20 guys crammed onto the screen.
I did run into one glitch. On the Vietnam stage, a turret gun would not move like it was supposed to. One time when I'd pick it up, it would have a limited range of motion as if cut off by invisible walls. Then I'd drop it, and pick it up again, and it'd have a different range of motion, but still limited. This was on the very busy Vietnam stage.
So far the gameplay is like Reflex's campaign, for better or worse. That is to say that when things are clicking on all cylinders, then it's a lot of fun. The set pieces are huge and awesome. It's still very trial-and-error, though, so that gets frustrating.
One mission in particular, I simply didn't even know what to do, and kept dying until accidentally triggering the next "checkpoint." Throw in infinitely respawning villains with friendlies that look just like your enemies, and it's not the best game design. Still, there is fun to be had, but truthfully, I see the singleplayer as just a way to warm into the new weapons and techniques.
If the multiplayer holds up, this looks like a very solid sequel to Reflex. If you liked that, then you'll like this.