My sister actually started the show this past Xmas. It was hilarious the way she would ask questions that we all asked during its original run. "Wait, so the Others are civilized? Who was that other group they hid from in the jungle? What's the smoke monster? How come Ben is still alive if Sayid killed him in the past? Which timeline is real now?"
It was a great show (Season 1 especially) but seeing her binge watch that really put things in perspective.