To the contrary, for those that value the convenience of having absolutely everything in sync between desktop and mobile browsers, Flow might not be your thing. For those that hold privacy on a pedestal, which everyone should, this could be a deal maker. That means cookies, passwords, and history won't be shared between your browsers. Instead of syncing everything between mobile and desktop browsers, Flow allows you to only add specific links, videos, images, copied text from sites, and notes, all of which will be automatically sync'd between browsers.
This is an important variation to other browser's syncing features. With Flow enabled, anything you add to the feature will automatically be in sync with both devices. And like other browsers, it now offers a built-in mechanism that allows you to keep your desktop and mobile versions in sync with one another. It's fast, stable, and offers some pretty cool features (some of which have been adopted by other browsers). Opera is a browser filled with possibility.