I've just switched to Opera 20 from Firefox. I am already missing PRINT PREVIEW with zoom. Firefox also has a great add-on called Print Edit that you can use to edit out the ads and other stuff you don't want to waste your ink on. I use it all the time. I print a lot of stuff for my friend who has vision problems and needs large print, so I need the ability to at least enlarge the text and preview the page(s) before I print.

Came to Opera from Firefox. So far it's okay. There is one GLARING omission that I use all the time in Firefox: PRINT PREVIEW. They also had a great add-on, Print Edit, that lets you edit out the extraneous junk like ads and such that you don't want to waste your ink on. It looks like older versions of Opera had print preview? But from what I've read here, the older versions have quite a few problems now?

As for Bookmarks, I use them, quite a lot and definitely would want to organize them into folders. As I'm new to Opera, I can't say if the features in 20 will meet this need or not.