Until now it seemed Opera was the most innovative Browser out there: Tabs, Browser Sync, "Magic" Input bar, ... Opera had it first, or did it better.
In my experience Opera has been pretty good with most webpages and was faster, especially with many web pages at the same time. But it does get laggy then. And especially (Google's) web applications such as Gmail and Google Reader respond pretty slowly in Opera.
I've set up the email account, because I was bothered how long things took in Gmail. And using Firefox was not better, using both is really annoying.
I wish Opera was available with Chrome's innovative new features... Hopefully they're already working on it. And Opera Browser for the Web 2.0.