I managed to get my hands on a copy a couple days before release and played through the single player (on PC) on Saturday and Sunday. The campaign was excellent, vehicle combat was fun and spread out pretty well. The enemies weren't super dumb, and the weapons all felt about right. If the damage/hit correction in the single player is in multiplayer then our complaints about that are taken care of.
The game lasted about 10 hours (felt about right) on normal, where I searched a bit for MCom stations to blow up and the unlockable weapons as you go through as well. My setup for most of the game was a 3-shot burst assault rifle + semi-auto sniper rifle in the other slot. It worked out perfectly well for all sitauations. I can't wait for the official release on Tuesday.
Although I'm a little saddened that there will be a Day1 DLC Map pack...
Performance-wise I didn't notice any stuttering at all playing with DX10 on medium/high settings across the board at 1920x1200 with my system in my sig.