I tried this with two of the product options. On Mamp (and the live server) when I go to the confirm page the buttons (modify order, submit order) at the bottom are missing. I can see them in the design view though.
OK Update: I had my cart name wrong. It seems to be working. On the first page of PayPal you have to highlight the words to see all of order details. Do you know what it will look like on the email receipt sent by paypal? (Will my customer be able to easily see the order details?)