Should you have read this much of a Gears of War-related review, I imagine at least one of the above four modes sounds up your alley. Just because Escape is currently wonky in action doesn't mean it's not a unique and satisfying co-op action experience. The campaign's herky-jerky start is likely worth enduring for a certain brand of shooter fan. And both Horde and versus are likely to delight fans old and new for entirely different reasons.
Do you like a game whose combat and discovery mechanics are entirely divorced from stop-and-wait delivery of lengthy, meandering dialogue, always spoken by over-eager actors with thick Eastern European accents? If so, you're in for some genuinely likable moments of character development; they're just firmly nestled in the kinds of overlong stories that might have you saying "get on with it, man" after a while. The spoilable plot beats, on the other hand, feel like fine B-movie cheese. Sometimes, these are full of scare-quote "important" messages freighted with fromage. (And sometimes filled with comically intense evil, too.)