The big question is "If you really DON'T like slasher movies can you still enjoy 'Cabin in the Woods?'"
I definitely don't like slasher movies. Make no mistake, for all its wit and cleverness and fantastical framing device a formula horror movie DOES play out more or less in full. Not to beat around the bush, I don't get why someone would want to see a screaming young woman being bloodily murdered. I'm going to quote Yahtzee wildly out of context here: "It's the same feeling I get from watching midget on giraffe porn, a sense of 'I'm certainly not getting off on this but I know someone in the world is and THAT'S what makes me uncomfortable."
I don't want to make too big a deal out of this, but for what it's worth I think slasher and torture porn can fuck right off.
That being said, the third act makes Cabin in the Woods worthwhile. It's a clever premise, well executed and even a little thought provoking. I'm not about to go around calling it the greatest thing ever, but if overall even I can have a positive experience with Cabin in the Woods, I think that counts as a recommendation.