This game has all you could hope for (aside from the occasional funny bug that shows up).

You want a horde shooter? This game got it.
You want missions that require you to be calm, collected, and calculated? This game got it.
You want to ball with a 4 man crew? This game got it.
You want a challenge? This game got it (to a certain degree of fairness).

TL;DR: This game got it. 10/10, would scream for a medic bag again.