The Process is simple: you define a product, they give you a Short ShopUrl (eg: http://shplnk.com/XkXaAQ), and when clicked, it takes you to their website, where the you enter your CC info. Sweet.
Nice easy set up.
Fees are a flat 4.5% + 45c.
Considerations:
“Stripe, for non-developers (Devs love it too)”
It's half baked at present. Several typos on Order Form, etc.
Don't see a way to change quantity.
Don't see a way to cancel payments, etc.
Maybe it's toooo simple?
* Disadvantages:
US Account required (Jan 2013). A pilot program for international vendors is starting.