I downloaded the beta version quite a while ago, just to see what they had back then.
To be honest, I was mostly interested in the art, which was very nice, compared to some 3.5e art. Especially the class pictures caught my eye, the monk even made me want to play a monk (which is a class I don't like) because the character looked so cool. Wayne Reynolds (Y).
Other than that, I'm interested in what they changed, but I'll never see it in play. Unless my DM suddenly decides to adopt it, which I don't see happening any time soon, it's very much out of my reach.