I like the one page checkout. Very lean and mean, but I am missing a possibility to have an order confirmation page. This is needed in some countries so customers can review their order before making it definitive.
That's been a "concern" of mine, too. I'm going to make the payment-method "exclusions" list a configuration setting, so that you can specify that the payment methods that your store(s) use require confirmation.
That's been a "concern" of mine, too. I'm going to make the payment-method "exclusions" list a configuration setting, so that you can specify that the payment methods that your store(s) use require confirmation.