It's typically slightly more expensive than finding the item stateside on sale.
But of course, if you find something that wasn't available in your country or you missed out on something, it's worth it.
You can sign up without an address, just use Chrome for auto-translate and pretend you can read what the signup process says and make your best guess. You won't be ordering from them anyway.
I had a bunch of old Geller stuff in my cart (that has since sold out) and I wish...