I've started using this as much as possible, especially during christmas. You find something, "in stock", supposed to be delivered the next day or a day after, you order, then nothing one day, two days, three days, then you call, "yeah, it's still with the distributed, it'll be ready tomorrow", two more days pass, you call again, want a refund, they "cannot refund now", because the product is supposedly in the mail already, then you wait, christmas goes by, and around 15. january you get a call, that they cannot get the item you wanted, and try to upsell some either more expensive or worse option.

Now I just order for physical pickup and "pay there" option.. and if it's not there, cancelling is easy, because they don't have your money yet, and they cannot lie about the item being already sent.