Got the starter pack on PC. Quite interesting - reminded me a little of the hostage rescue mission on CS, when playing the terrorist hunt mode.
Tried it on solo first. Died three times, then on the fourth attempt I extracted the hostage after stopping 22 of her abductors.
Although I expect it to be good online, I bet it will be hugely frustrating. Worse, there's several 'versions' of the game in terms of content. Those crazy enough to pump £80+ into it initially will have a massive leap ahead of the starter pack players like me.