Even the demo had bugs. For example I haven't "seen" the silenced rifle you can take before the MOUT course simply because your hands are empty when you pick it. "Wow". Several of the training mission don't trigger right and so you have to start them over to find out what you're supposed to do.
Both no major flaws but still far from a retail product, especially as one might have hoped that at least the "demo" would prove the critics wrong and show at least a small portion of the game, but without the problems the full game has.
Pretty sad situation. I must say that I had the game on pre-order, an order that I cancelled after I had spent some hours with the demo. Maybe a later, patched version works as it is supposed to be. Hopefully, as some ideas really seemed to be right and worked great.