After I've converted some people to use Opera, most of them asked me how to set up the windows so that surfing is more fun. I.e. just like I configured that browser, with the bookmarks to the left and without that senseless space wasting toolbar:
That's really a bit tricky, maybe they'll improve this in a newer version. Currently, you have to do this:
Select Tools -> Appearence. Choose the Toolbars tab. Click on that tool bar and choose 'off' as on the screenshot. Done.