My opinion on ArmA 2 from playing/tweaking with it this weekend.
This release realy pushes the franchise into a new era. The animations, the sounds, the great new campaign (which shows alot cool new tricks) all makes this game a great followup.
Sure there are bugs, performance issues, MP problems. I can understand that people who played only games like cod/bf and other blockbuster FPS are frustrated by the little bugs and 'jerkiness' of some controls, but if u workaround these issues u will be rewarded with one of the best game experiences u can get.
I have played all BI games and I rest assured most problems will be solved asap.