Good, about 40 missions if you play as both Russians and Americans. Those who fancy a change from the usual RTS routine. Good interface but the unusual elements can take a little getting used to.
RPG elements work.
Proper use of cover. Non-linear mission structure. Diabolical voice acting. Very short AI range. Just because you're not supposed to storm the enemy base doesn't mean you can't It would have gotten away with it too if it weren't for one gaping flaw, although quite a lot of people either won't see or care about that problem, hence the generally positive press the game has received thus far.