Opera says that "every design element in Coast has been carefully crafted for iPad. It’s not just a mobile interface scaled up to fit a touchscreen."
The browser is primarily gesture-based. There is no title bar, and the address and search fields are normally hidden from view. They can be see them with a simple downward swipe.
A small "home" button that returns the user to a desktop Safari-like grid of your most visited websites and a "most recent" button that displays the user's recent browsing history are the only persistent interface elements. Navigating backward and forward is done by swiping in the appropriate direction.