Actually i was stuck just after completing Manhattan mission, one of the best from my point of you. So i completed 50% of the overall campaign. The following missions are simply unplayable right now due to nest of bugs.
30 hours long playing ? I doubt anyone could sincerely answer at this time.
Campaign seems promising but, good lord, investissors should have let more time to devs for beta testing it ! So actually we are beta testers paying for a product not yet finished. it's more and more usual nowadays and it must be put to an end.
Next time, i will buy arma(3?), months after his release with a lower price.
Don't misunderstand it, Arma II will be a "must have" without all those bugs.