This version (based on Firefox 1.5.0.4) is an impressive improvement over the Flock Developer Preview from last October. In part because Firefox is better, but also the value added features are much improved, it's FAR more stable, and it's the prettiest cross-platform browser by a long shot.

Some have commented that this browser is SO much faster and more stable on OS X than Firefox: to be fair though, you need to create a new profile in Firefox before making the comparison. And a fresh install of Flock is a lot more fun than a bare Firefox.