I have had a spurt of web programming and web design work as of late. Along with a fresh new openSUSE install, this has driven me to give Opera 9 a try. I've been using it as my primary browser for a couple of weeks now leading me to decide to pen a few words on this venerable piece of software.
Opera is the Apple of web browsers. It is probably the prettiest browser you can use. I personally love the way it renders. Everything is very smooth, particularly the fonts. It isn't even something I can really put my finger on, so much as it is just the general experience. Also like Apple, Opera is an "all-in-one", no configuration, relatively little customization. If you like it? Great. If you don't, tough. The package IS the product. From Bittorrents, to adblockers, just about everything you would normally download an extension for in Firefox comes packaged right into Opera. Whether you consider this good or bad is an entirely subjective matter.
I did have only complaint: Opera crashed on me--a lot. Programs crash, it, to some degree, is a way of life. Nothing is perfect and, sometimes, it really is safer just to die, but Opera has given me more random crashes than I care to think about. At least session saving worked well.
In conclusion, draw your own. These are my experiences. Download Opera and tell me yours!