I've been using the beta for a few weeks on my XO lappy. It actually runs pretty nicely there...but Dragonfly is not as easy to use as Firebug. I get confused a lot (not just when trying to use Opera, but it's safe to say that it is more frequent while trying to use Dragonfly). But Opera seems to be cursed with a "too much" UI. Too many buttons, too many options, too much crud around the content.<p>Nonetheless, it works much faster on the XO than Firefox...it, unfortunately, doesn't handle scaling well at all, though, so the text is either way too small or way too big.