Maybe it's only me but TabCandy/Panorama feels slow and clumsy, and there's too much mouse clicking/moving involved in operating it (or so it seems after 5 minute of trying it, maybe a matter of getting used to/discovering keyboard shortcuts). I like Opera's solution more (is less revolutionary, and thus easier to adapt to probably). But other than that first impressions are good: feels faster and more responsive (at last!). Maybe I will give it some more tries to see if it will survive a stress test of a normal day-to-day use with tons of tabs opened, etc.