I saw the pilot the other day...not all that impressed. Not the worst new show I've seen, but not the best either. I think it's strange that there are comparisons to Lost, because it doesn't feel at ALL like that show. There is no central mystery. There is no hint of a possibly supernatural explanation. The only thing they have in common is islands.
I'd say the show is much more like 24, except with more of a focus on war and big weapons. I generally dislike war movies/TV shows, so even though I love 24-like shows, I don't think I can get on board with this one. It's almost good, but not quite. I'll watch one more episode but I doubt I'll stick around any longer. If I do, it's because of a deeper connection to the characters, which hasn't shown hints of emerging yet.