It's embarassingly slight for a 10.0 release [me-too speed dial tweaks and tab previews]. Only one Big Deal feature: speed.
And that's imaginary. I carefully and repeatedly timed a half dozen big sites but found load times are IDENTICAL [one site even slower!].

Only one good thing to say about it, that Opera isn't even bragging about: it no longer scrambles site formatting! Now that's sweet.