Been playing around with this for most of the day and IMO it's better than Opera which I load almost immediately when I get a new Windows Smart Phone. It's been playing any of the content I've thrown at it. YouTube, no problem. ESPN, no problem. Plays Flash as well as Silverlight, Ajax, and QuickTime.
Unfortunately it's Beta and I'm sure they'll be charging for it soon but I'll more than likely pony up for whatever it costs. Works with touch and non-touch Windows Mobile OS plus Symbian (Nokia) OS.