This is something that I haven't seen a straight answer on yet (from Amazon). When you make the restore request, you restore a "block" of data (or container, can't remember what they call it). And you have no control over how fast they restore that container -- if they take 4 hours, it is one price, but if they decide to take less than an hour then they bill you more, for something that isn't under your control -- correct? I did see where you can request a partial container restore (range restores, I think they call it), so you can at least have some control over the retrieval rate (you can, for example, every 2 hours request 10% of a container to restore). But that still seems like a lot of areas that can go wrong.