It sucks donkey c0ck.
Or...
I cant see any dramatic improvement over Mozilla that justify paying for it.
Its not got anything huge wrong with it, but just lots + lots of niggly things - no middle click tab opening, the fact tabs take focus automatically by default (and the option to change it isnt obvious), and its just plain ugly (with my pc theme anyway).
As for mouse gestures - I used them for about a month when Opera 5 was released, and they didnt do any thing for me - whats the point gesturing at a link when you can just click it?
Mozilla wins on the grounds of development community too - anything you can get for Opera is no doubt availible as a plugin on mozdev (such as leech - download every image link on a site anyone as well as advanced tabbing, gestures etc).
It just doesnt do enough to justify the payment.
www.mozilla.org
just turn on the modern theme rather than the nasty default one.