Three things:

First, the pop-up dialogs are annoying. Just show the number next to the + button (and add '-' and 'x' buttons to decrement and delete, respectively), and update it whenever I + or -. That's all the feedback I need.

Second, there's mention of product images, but they're not showing up for me on the latest Firefox.

Third, there should be a price estimate for each product I add in the product selection screen.