Due to the number of "level completion achievements" I still have left, I'd say I'm about half way through and am having a blast with this game.
Ground combat feels familiar(ie Gears of War) and the flying portion is fun and intense. Plus the levels vary in design allowing you to sometimes mix up your combat no matter what kind of enemies you're facing. For giggles and shits I flew through the legs of a giant enemy called "the archon"(i think) remembering the classic shot of skywalker flying through the imperial walkers legs, and sure enough an achievement popped up "i forgot my tow cable."
I will say the enemies are suspiciously familiar to those in Mass Effect, but are as challenging as they are fun to demolish.
So far the story is slightly better than mediocre but has a level of mystery I'm dying to get into. Hope to have it finished before Mass Effect 2 comes out.