It's FAST. The security features are second to none, and it doesn't have all the security vulnerabilities that IE has (Opera programmers actually seem to know how to build a safe brower). You can take complete control of cookies, pop-up windows (even refuse them if you want). And did I mention it's fast? There's a freebie version (with a small banner ad), or you can pay for it (and it's worth it, IMHO). I tried the freebie, and decided it's good enough to fork over a few bucks.