I finally got to play the game too.
Love it, i must say. Very nicely optimized in my opinion, it ran alot better than i expected (max settings, 1080p @ 60fps vSynced) wich i really loved. The movement is a bit bulky and slow, the gun recoil isnt that lovely either (i would want a bit more, eh). As it was in BC2, the sound is amazing ... but ... i can very clearly hear the waveform hitting the limit when a explosion is near me and sometimes when i shoot, wich is a failure in my opinion, i want clear sound guddammit!.
Overall, very good game in my opinion. By the end of the Beta, i assume they will improve the major stuff. I didnt see any bug except when i died, my ragdoll's legs got stuck in the rock and then it was jiggling around in there.
Edit: It ran 60fps and i was easily able to fraps the game in 720p 30fps. But that was in the winter map. The desert one didnt want to run so smooth, it was stuttering between 10-30fps.