Having used Opera since Netscape disappeared (1999?), I agree with all the negative comments expressed above. HELP is ridiculous, user-friendly features like customisable toolbars have disappeared, no way of opening a local HTML file from the browser, no viewable cache, etc. etc. - the list of my complaints is much, much longer.
Fortunately I had kept an installable copy of Opera 9, so I'm using it more and more frequently in lieu of this sorry new release.