I was a little disappointed with it, they didn't show enough about Locke and the others that went with him,and why do you think they just let Sawyer and Kate get out and be together like that? I've heard a theory that it is a breeding facility, and that is why Ben picked Juliette who resembles Sarah to be with Jack. Personally I think the other's reason for being there is more complex than that. At least I hope it is.